Tag Archives: Fermi Paradox

UFOs and the Crisis Seeking State

26 Friday Mar 2021

Posted by in Extraterrestrial Life, Government

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Happy with the government’s management of the pandemic? Happy with how much government grew during the pandemic? How well do you think governments would manage our realization that we have nearby extraterrestrial observers? It’s hard to know what that would mean for our future, but such a presence could well pose a singular menace to humanity. It might ignite panic, to say nothing of the bedlam that would ensue with the actual ingress of extraterrestrials or their intelligent machinery.

How would governments handle it? If the pandemic is any guide, my guess is they would follow the authoritarian impulse. For our own safety, that is. Hoarding and shortages of key goods might ensue. Curfews and stay-at-home orders would be seen as a way to limit civil disorder. Depending on the perceived threat, draconian measures such as limiting the use of electronics and communication devices might be considered. No telling what might seem appropriate to political leaders, but a military component to the response is much more likely than under a pandemic, and not just because of the external threat.

Let’s assume we’re talking about observers, not battalions of landing parties. A lot would depend on what’s known about them, or more specifically what the government knows. Why are they probing our atmosphere? Why are they studying our planet and our civilization? Are they waiting for a larger force to arrive? Can their machines self-replicate using resources mined from elsewhere in the solar system? Of course, the reaction of the public depends on how the government characterizes the presence of our observers. That gap in knowledge is of great concern.

But let’s take a step back. Is it real? We know the pandemic was “real”, but many question its true severity and the appropriateness of stringent non-pharmaceutical interventions, including yours truly. Some would say the government’s response was opportunistic, calibrated to force a change in political leadership, and calibrated to transform the role of government in our lives as well as attitudes about that role. Now imagine the opportunity for even more drastic change in the role of government given the prospect of an intersection with a potentially grabby alien civilization!

Like many others, I am fascinated by the possibility of life beyond our planet. Discussions of the Drake equation and the Fermi paradox are like candy to me. UFO sightings are always a matter of curiosity, except now we’re learning to call them “unexplained aerial phenomena” (UAPs) under guidance from government and military authorities. Lately, we’re hearing a lot about UAPs observed and filmed by military aircraft and detected by other forms of telemetry. These admissions are considered a sea change in the government’s attitude toward sharing sensitive, and possibly socially disruptive, information with the public. By June 1, a large batch of information on additional UAP sightings is due to be released under the Intelligence Authorization Act of 2021, which was signed into law by President Trump in December.

I’m as curious as anyone, but there are many reasons to be skeptical about UAP sightings, at least insofar as entertaining the possibility that these are extraterrestrial beings or machines. For example, there are natural (and technical) explanations for the images seen in the Navy videos. But some have speculated that these are sightings of top-secret technologies developed by an agency of the federal government such as the Defense Advanced Research Project Agency (DARPA). A former Pentagon UFO Program Chief dismisses that as improbable. Well, if you say so. Another possibility is that a foreign government has leaped far ahead of the U.S. in the science of flight. That would be threatening to U.S. security, though perhaps not as threatening as the machinery of an interstellar expeditionary force.

Whether the potential threat is an intersection with extraterrestrials or simply advanced technology possessed by an earthbound adversary, might it be in the interests of certain factions to promote our vulnerability? Or to manufacture evidence of such a vulnerability? Forgive my tin-foil hat, but I think the answer is yes. For example, it would be an opportunity for the defense establishment to garner more funding. It’s also a potential opportunity for those who wish to impose a more authoritarian order. There is always something to be gained from potential threats, so much so that major segments of our society seem to thrive on them. But is that what’s happening?

Defense funding is one thing, but the kinds of threats in question might call for widespread actions on public safety at all levels of government. Federal funding will be required to meet these needs, after all, and only the federal government can print money to create the means of competing for resources with the private sector. This is consistent with other federal initiatives that, beyond their stated public purposes, seem almost designed to eviscerate the power of state and local governments:

“The plan to federalize government is already moving and has three parts:

  • Flood every unit of local government with federal cash, irrespective of need, while prohibiting tax cuts, thereby bailing out failing states and cities.
  • Make that flood of federal money made regular and permanent.
  • Annul or override state laws that make certain states competitive, thereby eliminating their competitive advantages, and federalize elections to make it all permanent.”

The third point has as much relevance in the context of any threat to our security as did the pandemic. Once lower levels of government are dependent on federal funds, there is little they can do to resist federal demands. The more credible the threat of an incursion by an extraterrestrial or foreign force with awesome technological power, the more likely are voters to accept expansive programs to enhance their safety, including assistance to lower levels of government for providing various forms of local protection … the federal way.

The pandemic did little to promote faith in the government’s ability to manage a crisis. Nevertheless, look no further than the federal budget explosion induced by the pandemic for evidence that advocates of expansive government did not let the crisis go to waste. Will they want new crises? I’m sure they will. There’s certainly a possibility that a drummed-up threat from UAP’s would be a candidate down the road. It might need a little more percolation, but make no mistake: it has potential value to statists.

I still prefer to call them UFOs, and it’s still fun to think about them, but if they’re “real”, or even if they belong to a foreign power, we might be in big trouble. If they’re not “real”, our own state actors might toy with us enough to make us wish we’d never heard of UFOs.

Our Stardust Scrutiny, A Reverie Thus Far In Vain

01 Friday Jul 2016

Posted by in Extraterrestrial Life

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The Fermi paradox juxtaposes the fact that we’ve heard no signal from extraterrestrial life against claims that life must be common in the universe. The paradox, named after physicist Enrico Fermi, is not so inscrutable given 1) the immense distances in interstellar space; 2) the likelihood that few civilizations have survived long enough to attain a high level of advancement; and 3) the slim chance (until recently, perhaps) of detecting messages from a distant civilization.

These points are addressed in recent paper by Evan Solomonides and Yervant Terzian of Cornell University entitled “A Probabilistic Analysis of the Fermi Paradox” (the full PDF is available for download on the upper right at the link). The authors note that the first broadcast from Earth that could be detected beyond the planet took place roughly 80 years ago. Unfortunately, it was Hitler’s commentary on the superiority of arian athletes at the 1936 Olympics. That seems a shame, but then it’s unlikely that the recipients can interpret the signal at all. Still, the authors estimate that by now, that broadcast will have reached over 8,000 stars and over 3,500 earth-like planets within an 80 light-year sphere around the Earth. That might sound like a lot, but it is an infinitesimal fraction of the Milky Way galaxy. There is roughly a zero chance that an advanced civilizations exists within a population of potentially habitable planets that small.

How Common Is Life?

Solomonides and Terzian extend their analysis using a version of the so-called Drake equation, which relies on a series of assumed probabilities to calculate the number of of active, intelligent civilizations in the galaxy, call it N. However, the authors assert that their version of the Drake equation yields an estimate of N for the entire history of the galaxy, but it looks very much as if they’ve simply redefined the equation’s terms. They use the equation to specify a relation between 1) the average length of communication history for all intelligent civilizations; and 2) the total area of all spheres of coverage, which is dependent on N. They assert that as of today, this combined area must encompass less than one-half of the galaxy because that implies that we are less likely to have heard a signal from extraterrestrials than not to have heard one. And we haven’t. However, this seems like a thin foundation from which to draw implications, and it is based on an expectation. Even if those spheres covered 90% of the galaxy or more, it would not rule out the silence we’ve “heard” to date. Nevertheless, the authors use this inequality to derive a lower and upper bound on the number of intelligent, communicating civilizations in Milky Way history.

Expanding Broadcast Spheres

Again, Solomonides and Terzian define “spheres of communication” extending into space as far in light years as the length of a civilization’s broadcasting history in earth-years. Earth’s sphere of communication now extends outward by 80 light years. But imagine that a long-extinct civilization on the other side of the galaxy sent messages about 30,000 years ago. The signal might be reaching us just now. But if that civilization’s broadcasting history lasted 1,000 years before an untimely extinction, its broadcast sphere would be like a hollow, expanding dumpling, now almost as wide as the galaxy itself but with dough walls a constant 1,000 light-years thick. Only the walls contain broadcast information, so the areas of spheres like these are not simply additive. The hollow “inner spheres” must be subtracted to get the total broadcast area.

Revisiting the Duration of Broadcasts

The communication spheres defined by Solomonides and Terzian are “disks” rather than spheres, because collapsing the galaxy into two dimensions simplifies the analysis. They do not appear to allow for the sort of hollowness implied by an older, advanced civilization with a limited survival time. That matters in terms the history relevant to our failure to detect signals thus far. If a civilization’s broadcasting history is of short duration relative to its distance from Earth, then its communication sphere has thin broadcast walls. If that now-extinct civilization originated signals on the other side of the galaxy more than about 35,000 years ago, the signals would be irrelevant to “our” Fermi paradox because by now, Earth is almost certainly inside the wall of its expanding broadcast “dumpling”. The signal passed us by before we were advanced enough to have thought about it. So the relevant history of the galaxy, for purposes of identifying the broadcasting histories of civilizations we might have heard from by now, goes back a bit farther than the total width of the galaxy, which is roughly 32,600 light years. The relevant history might be 35,000 years, give or take, not the 13 billion years since the galaxy’s birth. At least that limits one dimension of the problem.

I find the following sentence somewhat troublesome because Solomonides and Terzian seem to focus on the length of broadcasting histories only with reference to the present time:

“The planar area of the galactic disk reached by communication from any intelligent civilization (assuming such civilizations are uniformly dispersed throughout the galaxy) can be modeled as the area of N disks with radius Lh (average length of broadcasting history in years)…“

Some of those N disks are probably hollow. The idea that civilizations are commonplace may not mean that they all exist contemporaneously, and while the authors must understand that point, the description above implies that all disks are saturated with broadcasted information from center to outer rim rather than hollow.

Solomonides and Terzian then attempt to place the radius of earth’s own minuscule broadcast disk within the hypothetical distribution of all such discs within the galaxy:

“… we know that humanity was almost certainly not the (or even one of the) first species in the galaxy to develop broadcasting technology, nor one of the last. Put statistically, it can be said with a high degree of confidence that humanity is somewhere in the median 90% of the population of galactic species as far as broadcasting history is concerned. That is to say, we are not among the first nor last 5% of civilizations to develop this technology. … Taking a very conservative estimate, we posit that we have been broadcasting for 5% as long as the average communicative species has been, and as such this upper limit on the average is approximately 1600 years. This can be substituted back into the inequality derived previously to give an idea of the frequency of life that our apparent loneliness suggests.“

A couple of notes on this statement: First, it assumes that the lengths of broadcasting histories are distributed uniformly from 0 to 1,600 years. Second, it seems to preclude any history of broadcasts prior to 1,600 years ago. If that is the case, then the number of civilizations they consider are what I’d call “near contemporaneous”. The authors do not seem to be accounting for all history after all.

Few Neighbors Or Many?

The authors go on to calculate lower and upper bounds on the number of communicating civilizations in the Milky Way, but again, in light of the quotes above, the implied existence of civilizations seems to be near-contemporaneous. Perhaps that’s okay for arriving at a lower bound. Again, Solomonides and Terzian assume that our 80 years of communication history puts us below 95% of all other communicating civilizations. Therefore, the longest history among such civilizations would be just 1,600 years. Because we have heard nothing, there must be great distances between relatively few civilizations: only about 210, according to Solomonides and Terzian.

In light of the relevant history of the Milky Way, 1,600 years seems outrageously short for the longest communication history. To my way of thinking, broadcast histories, whatever their number, must be distributed over the entire galaxy and over a time span of about 33,000 years. If extinctions shorten the duration of those histories, then it is possible that we’ve simply missed the outer walls of a number of broadcast disks that have already reached us. In that case, civilizations must be sparse both spatially and over time. Unfortunately, the authors’ lower bound for the number of communicating civilizations must be taken as an estimate for civilizations whose existence is near-contemporaneous with our own. However, that does not fit as neatly into an explanation of the Fermi paradox as the authors would like.

For an upper bound on the number of communicating civilizations, the authors assume that we are on the verge of hearing from another civilization in response to our initial communication. If so,  then we have a very close, neighboring civilization about 40 light years away, which implies an outrageously high frequency of civilizations in the galaxy: about 78 million, according to the authors. The upper bound relies on an assumption that it’s necessary for Earth to receive a response to our communication, as opposed to receiving an independent communication from afar. Perhaps the signal/response requirement is imposed for reasons of estimating a more densely populated galaxy for the upper bound.

The lower and upper bounds imply that life is either rare or ubiquitous; the authors claim that either is an unreasonable violation of the so-called “mediocrity principle”, which posits that our civilization is “run-of-the-mill”: the first is a violation because we are rare; the second is a violation because we’ve somehow managed to avoid hearing anything despite the denseness of communicating civilizations in the Milky Way.

Great Filters

It’s reasonable to question the assumption that an advanced civilization’s broadcast history would be of relatively short duration. The galaxy is a hazardous place, however, presenting extreme natural threats to any planet finding itself in a “Goldilocks zone” near its host star and capable of harboring life over an extended period. Threats range from interloping space rocks to variations in a planet’s exposure to radiation. Then, there are hazards to life arising from natural conditions on the planet itself, such as extreme volcanic activity and perhaps natural toxins. Finally, the development of technology brings hazards as well, including the possibility of chemical, biological and nuclear calamities. All of these constitute “Great Filters” that may prevent civilizations from reaching a stage of advancement sufficient for interstellar travel and colonization of other worlds.

Can such hazards be expected to put a halt to a representative civilization’s broadcasting, and within how many earth centuries? In some cases, it’s likely to be as few as 10 or 20 centuries, but even if extinction is common, there are also likely to be a few civilizations making it to the far right tail of the survival distribution. Those few civilizations, or even one, could have begun broadcasting so long ago that their communication spheres are much larger than the galaxy itself. We might just hear them if they exist, but perhaps that argues that they do not.

Detection and and Understanding

Beyond the limits of communication spheres, another compelling reason for our failure to detect signals from other civilizations is signal degradation over great distances. According to Solomonides and Terzian, signal strength weakens with the inverse square of distance. Even today, messages of extremely distant origin might be impossible for us to discern, let alone understand.

“Though a handful of these signals have been designed to be picked up by extraterrestrial intelligence (…. i.e. Fibonacci, the prime numbers, the squares, all broadcast in binary), the vast majority would be indecipherable. This is because an alien civilization would need to first decode binary into sound (and figure out our tone encryption method) or video (with very specific, inconsistent formats), and if they could somehow do that, they would then need to decode the resulting 3,000 human languages … into something they could parse successfully.“

Given sufficiently well-equipped listening centers here on Earth, detection becomes something of a mathematical exercise. Over the past 10-15 years, there have been advances in developing algorithms to extract signals from an otherwise noisy background.

Conclusion

With plausible assumptions, the Drake equation yields the conclusion that the galaxy may be populated with a large number of intelligent civilizations, larger still if we count those existing at any time over the past 35,000 years. The Solomonides and Terzian paper shows that the lack of detection on Earth is not very surprising, but in a limited context. The silence might be even less surprising if many of the historical civilizations had a broadcasting age of limited duration, generating hollow broadcasting spheres, because the walls of many of those spheres would have passed us by long before our own radio age. Therefore, the Fermi paradox does not seem to be such a paradox after all.

 

 

Will ET Be a Socialist?

19 Wednesday Aug 2015

Posted by in Capitalism, Socialism, Space Travel

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If we are ever visited or contacted by agents from an extraterrestrial civilization, what kind of society will they come from? The issue is given scant attention, if any, in discussions of extraterrestrial life, at least according to this interesting piece in The Freeman by B.K. Marcus. The popular view, and that of many scientists, seems to be that the alien society will be dominated by an authoritarian central government. Must that be the case? Marcus notes the negative views taken by such scientific authorities as Neil deGrasse Tyson toward laissez faire capitalism, and even Carl Sagan “… could only imagine science funded by government.” Of course, Tyson and Sagan cannot be regarded as authorities on economic affairs. However, I admit that I have fallen into the same trap regarding extraterrestrial visitors: that they will come from a socialist society with strong central command. On reflection, like Marcus, I do not think this view is justified.

One explanation for the default view that extraterrestrial visitors will be socialists is that people uncritically accept the notion that an advanced society is a planned society.  This runs counter to mankind’s experience over the past few centuries: individual freedom, unfettered trade, capitalism and a spontaneous social order have created wealth and advancement beyond the wildest dreams of earlier monarchs. Anyone with a passing familiarity with data on world economic growth, or with F.A. Hayek, should know this, but it Is often overlooked. Central planners cannot know the infinitely detailed and dynamic information on technologies, resource availability, costs and preferences needed to plan a society with anything close to the success of one arranged through the voluntary cooperation of individual actors.

Many of us have a strong memory of government domination of space exploration, so we tend to think of such efforts as the natural province of government. Private contractors were heavily involved in those efforts, but the funding and high-level management of space missions (NASA in the U.S.) was dominated by government. Today, private space exploration is a growth industry, and it is likely that some of the greatest innovations and future space endeavors will originate in the private sector.

Another explanation for the popular view is the daunting social challenges that would be faced by crews in interstellar travel (IST). Given a relatively short life span, a colonizing mission would have to involve families and perhaps take multiple generations to reach its destination. There is a view that the mini-society on such a ship would require a command and control structure. Perhaps, but private property rights and a certain level of democratization would be advantageous. In any case, that carries no implication about the society on the home planet nor the eventual structure of a colony.

A better rationale for the default view of socialist ETs involves a public goods argument. The earth and mankind face infrequent but potentially catastrophic hazards, such as rogue asteroids and regions of strong radiation as the sun orbits the center of the Milky Way galaxy. These risks are shared, which implies that technological efforts to avert such hazards, or to perpetuate mankind by colonizing other worlds, are pure public goods. That means government has a classic role in providing for such efforts, as long as the expected benefits outweigh the costs. The standard production tradeoff discussed in introductory economics classes is “guns versus butter”, or national defense (a pure public good) versus private consumption. IST by an alien civilization could well require such a massive diversion of resources to the public sector that only an economically dominant central government could manage it. Or so it might seem.

As already noted, private entrepreneurs have debunked the presumed necessity that government must dominate space exploration. In fact, Elon Musk and his company SpaceX hope to colonize Mars. His motives sound altruistic, and in some sense the project sounds like the private provision of a public good. Here is an interpretation by Tim Urban quoted at the link (where I have inserted a substitute for the small time-scale analog used by the author):

“Now—if you owned a hard drive with an extraordinarily important Excel doc on it, and you knew that the hard drive pretty reliably tended to crash [from time to time] … what’s the very obvious thing you’d do?
You’d copy the document onto a second hard drive.
That’s why Elon Musk wants to put a million people on Mars.”

Musk has other incentives, however. The technology needed to colonize Mars will also pay handsome dividends in space mining applications. Moreover, if they are successful, there will come a time when Mars is a destination commanding a fare. Granted, this is not IST, but as technology advances through inter-planetary travel and colonization, there is a strong likelihood that future Elon Musks will be involved in the first steps outside of our solar system.

While SpaceX has raised its capital from private sources, it receives significant revenue from government contracts, so there is a level of dependence on public space initiatives. However, the argument made by Marcus at the first link above, that IST by ETs is less likely (or impossible) if they live under a socialist regime, is not based primarily on recent experience with private entrepreneurial efforts like Musk’s. Instead, it has to do with the inability of socialist regimes to generate wealth, especially the massive wealth necessary to accomplish IST.

Discussions of ETs (or the lack thereof) often center around a question known as the  Fermi Paradox, after the physicist Enrico Fermi. He basically asked: if the billions and billions of star systems, even in our own galaxy, are likely to harbor a respectable number of advanced civilizations, where are they? Why haven’t we heard from them? My friend John Crawford objects that this is no paradox at all, given the vastness of space and the difficulty and likely expense of IST. There may be advanced civilizations in the cosmos that simply have not been able to tackle the problem, at least beyond their own stellar neighborhood. No doubt about it, IST is hard!

I have argued to Crawford that there should be civilizations covering a wide range of development at any point in time. In only the past hundred years, humans have increased the speed at which they travel from less than 50 miles per hour (mph) to at least 9,600 mph. The speed of light is approximately 270,000 times faster that that! At our current top speed, it would take almost 50% longer to reach our nearest neighboring star, Alpha Centauri, than the entire span of human existence to-date. With that kind of limitation, there is no paradox at all! But I would not be surprised if, over the next 1,000 years, advances in propulsion technology bring our top speed to within one-tenth of the speed of light, and perhaps much more, making IST a more reasonable proposition, at least in our “neighborhood”. There may be civilizations that have already done so.

Answers to the Fermi Paradox often involve a concept called the Great Filter. This excellent HuffPo article by Tim Urban on the Fermi Paradox provides a good survey of theories on the Great Filter. The idea is that there are significant factors that prevent civilizations from advancing beyond certain points. Some of these are of natural origin, such as asteroids and radiation exposure. Others might be self-inflicted, such as a thermonuclear catastrophe or some other kind of technology gone bad. Some have suggested that the Large Hadron Collider in Switzerland could be a major hazard to our existence, though physicists insist otherwise. Another example is the singularity, when artificial intelligence overtakes human intelligence, creating a possibility that evil machines will do us in. The point of these examples is that some sudden or gradual development could prevent a civilization from surviving indefinitely. These kinds of filters provide an explanation for the Fermi Paradox.

More broadly, there could be less cataclysmic impediments to development that prevent a society from ever reaching an advanced stage. These would also qualify as filters of a sort. Perhaps the smart ETs lack, or failed to evolve, certain physical characteristics that are crucial for advancement or IST. Or their home planet might be light on certain kinds of resources. Or perhaps an inferior form of social organization has limited development, with inadequate wealth creation and technologies to transcend the physical limitations imposed by their world. On a smaller than planetary scale, we have witnessed such an impediment in action many times over: socialism. The inefficiencies of central planning place limits on economic growth, and while high authorities might dictate a massive dedication of resources toward science, technology and capital-intensive space initiatives, the shift away from personal consumption would come at a greater and greater cost. The end game may involve a collapse of production and a primitive existence. So the effort may be unsustainable and could lead to social upheaval; a more enlightened regime would attempt to move the society toward a more benign allocation of resources. Whether they can ever accomplish IST is at least contingent on their ability to create wealth.

Socialism is a filter on the advancement of societies. ETs capable of interstellar travel could not be spawned by a society dominated by socialism and central planning. While government might play a significant role in a successful ET civilization, one capable of IST, only a heavy reliance on free-market capitalism can improve the odds of advancing beyond a certain primitive state. Capitalism is a relatively easy ticket to the wealth required for an advanced and durable civilization, and conceivably to the reaches of the firmament.

Unfortunately, there is absolutely no guarantee that capitalistic ETs will be friendly  toward competing species, or that they will respect our property rights. They might be big, smart cats and find us mouse-like and quite tasty. Their children might make us perform circuses, like fleas. In any case, if ETs get this far, it’s probably because they want our world and our resources. My friend Crawford says that they won’t get here in any case. He believes that the difficulty of IST will force them to focus on their own neighborhood. Maybe, but on long enough time scales, who knows?

I would add a caveat to conclusions about the strength of the filters discussed above. A capitalistic society might reach a point at which it could send artificially intelligent, self-replicating machines into space to harvest resources. Those machines might well survive beyond the end of the civilization that created them. Conceivably, those machines could act autonomously or they could take coordinated action. But we haven’t heard from them either!

For a little more reading, here is SETI‘s description of the Fermi Paradox, and here is a post from io9 on the Great Filter.