[Question] Is there a definitive intro to punishing non-punishers?

Hey LW. I’ve just written a draft of an article, that I’m trying to edit to link to useful prior notes on various concepts. One of those concepts is the idea that we evolved to “punish the non-punishers”, in order to ensure the costs of social punishment are shared by everyone.

The thing is, I vividly remember reading an article from the rationalsphere that introduced me to this idea many years ago, but I cannot seem to find it anywhere. The idea is mentioned many places where I could have seen the original article, including on Overcoming Bias, Slate Star Codex, and Less Wrong, but all my searches seem to find passing mentions in comments, or throwaway mentions in articles assuming you already know what it means.

Since my article will otherwise continue this apparent tradition of assuming everyone knows what it means and not linking to an introduction, can anyone point me to the article I’m recalling, or perhaps suggest another good non-technical introduction to the idea (i.e. not this paper), so readers of the article I’m writing who aren’t yet familiar with the idea can learn about it? Thanks!