I don’t know if you like parties. I don’t know if you’re organized or punctual. But I bet you don’t like rotting smells or long swims in freezing water. That is to say: People are different, but only in certain ways. What’s the difference?

~ “Dynomight” from,

This article is about personality types, and it goes down the rabbit hole, (in a good way.) We’ve all learned about the theory of evolution, and there are countless examples where it’s used to explain—or at least to try to imagine—how some specific feature of ourselves came to be so.

Way down in that article he mentions in passing that we—us, the people—might not currently be in equilibrium with the current selection pressures. This was a startling thought for me. Evolution can be fast—a gene mutation leading to a significant change in one generation—but I’ve always had the impression that it is most often slow and steady. I’ve always imagined a big-ship with a small-rudder metaphor. And I’ve always had the impression that who we are genetically, (the big ship) has its rudder set for straight-ahead. I’ve imagined that at some point in our distant past, selection pressures made us who we are as a species, and that was then. This is now, when we’ve been on a stable, no-changes evolutionary course for all of recorded history.

What if, let’s say around the time of the invention of the transistor and computers, the social pressures changed drastically. That is to say: Suppose that introduced a major change in the rudder’s position? Suppose we, the big ship with the big pile of DNA-encoded information, are right in the middle of a slow course change. What if right now, important and noticeable features of our biology and psychology are being strongly differentially selected?