Decadent Singularity

Your Birth Is Not a Crystal Ball
Humanity, having exhausted all sensible questions, occasionally amuses itself by asking how many humans will ever exist, and then—without any apparent shame—proceeds to answer this using nothing more than the date on their own birth certificate. One must admire the ambition: why build telescopes, define uncertainties, or tolerate data when one can simply *exist* and consider the matter settled?

The argument runs like this. You, a distinguished observer of the universe and connoisseur of existential angst, look around. You notice there are quite a few people walking about—billions, even—and conclude that you must be situated somewhere near the maximum of this great population curve. Why? Because, the story goes, if the human population were to balloon for another million years, your status as an early arrival would be “improbably early,” and nature, in her benevolence, is known to avoid improbable events. Please ignore quantum mechanics, whose lifestyle choices contradict this policy daily.

Thus—so the reasoning continues—you must be approximately midstream in the great river of human existence. In fact, you can even estimate when the river dries up by counting how many humans have existed, looking at which numbered human you are, and extrapolating as if human civilization were a four-function calculator.

This line of thinking is, of course, preposterous. But it’s preposterous in an interesting way.

The central mistake is the touching belief that you are a “randomly selected human from the set of all humans who will ever exist.” This is a beautiful idea, in the same way that perpetual motion machines are beautiful: enchanting, elegant, and entirely unencumbered by reality.

You were not plucked from some transcendental hat containing the souls of every past and future Homo sapiens. You were produced the old-fashioned way: by a highly specific chain of ancestors whose lives, geography, reproduction rates, and regrettable decisions determined precisely where and when you would appear.

If one insists on a raffle metaphor, then you are less a random draw and more one of those tickets stapled to the back of another ticket stapled to a stack of tickets that were all printed at the same questionable municipal office. In short: your existence is a byproduct of the past, not a sampling from all time.

This makes it difficult—though somehow people still manage—to treat yourself as an unbiased probe into the far future.

But wait, someone protests. If the future is determined by the present (they have recently learned about determinism and wish to try it out), then everything about the future is in principle encoded in the present. And since you are part of the present, surely your existence gives you a glimpse into the future.

This is a comforting eternalist fantasy, much like believing that owning a dictionary enables one to predict the next bestseller. Determinism may guarantee that the future is fixed, but it does not grant you access to the required initial conditions—unless you believe that your thoughts include the positions of all particles in the early universe, in which case your problems are subtler than anthropics.

One must remember that information flows forward. Yes, the future is determined, but no, it does not reach back to tap you on the shoulder and whisper: “By the way, there will be only 93 billion of you.”

Your birth tells you about the past—specifically the conditions under which your ancestors felt inspired, obligated, or bored enough to reproduce. It tells you vanishingly little about the population of the year 300,000 CE.

It is truly remarkable how often people insist on sampling theory without ensuring that they belong to the population they are sampling from. One cannot use their birth position among “all humans who will ever exist” to infer the total number, because that presupposes that your existence was equally likely across all possible futures. It was not.

To interpret your moment of birth as privileged statistical evidence about the end of civilization is like discovering you were born in a hospital and concluding that all buildings in the world must be hospitals, or at least that the number of non-hospitals is statistically limited by your birth’s improbability.

But do not worry. This mistake is made frequently, confidently, and in excellent company.

It is true that you have been born at an odd juncture—technologically adolescent, demographically inflated, and cosmologically provincial. But this is not because the universe contrived to place you near the center of its vast family tree. It is because your parents lived here, and their parents lived here, and so on, back through a long and largely unromantic chain of circumstances stretching into the shadows of prehistory.

If you wish to predict the future of humanity, your birth is the least informative datum you possess. Climate data would be better. Economic data would be better. An hour spent observing human behavior in a supermarket would be better.

Your birth tells you only one thing with certainty:

**That the past was sufficient, somehow, to drag you into existence.
What it says about the future is precisely nothing.**

Current Mood: contemplative