Yes, I was surprised that the article didn't mention neurogenesis. It's worth pointing out a result from game theory: Given related individuals (using the examp

Yes, I was surprised that the article didn't mention neurogenesis. It's worth pointing out a result from game theory: Given related individuals (using the example of two shepard brothers who may signal each other for help) there are many signaling equilibria. The particular path is sensitive to random initial conditions. Interestingly, even for a simple game where a non-signaling altruistic solution dominates, a signaling solution reliably emerges and converges. Game Theory Evolving, Herbert Gintis, 2000 (first edition), pp 321-323.