Interactions among Individuals and the response to Community Selection

Last week, based on theory, I made the claim that group selection could act on interactions among individuals.  At the risk of exposing my over-inflated ego I think that one of the best experiments demonstrating this is my postdoctoral research on selection in two species communities of Tribolium (Goodnight 1990. Evolution 44: 1614-1624; Goodnight 1990. […]

Indirect Effects, Bruce Griffing, and Mean Plants

One of the striking results of the Wade group selection experiment is just how effective group selection was.  Indeed, it was far more effective than anybody ever expected.  On thinking about this Wade (and I as a hanger-on starting graduate student) a likely cause of this unexpected response quickly became clear.  When Thomas Park did […]

Wynne-Edwards, Theoreticians and Group Selection: When Data Meets Theory

When talking about multilevel selection it is worth giving a bit of history.  This does two things.  First, it shows us where we came from, but more importantly, the study of MLS is fraught with missteps that perhaps we can avoid in the future. . . In talking about MLS one should probably go back […]

Multilevel Selection: The Adaptation Approach and the Evolutionary Change Approach

Last week I finished talking about gene interaction for at least a while.  I hope I convinced you that assigning fitnesses to individual genes is a fools errand, both because in a world with interactions the assignment of fitnesses to individual alleles would be so context dependent as to be useless, and because it ends […]

Why I like the phenotypic view: Epistasis and the mean field approximation

Before we move on to multilevel selection, I realized that I had not finished an important aspect of the story I was developing.  In particular, I did not step back and ask how all the talk of gene interaction affected the main thesis of this blog, the phenotypic view of evolution.  I tell other that […]