Why the following: "the selection pressure at the individual level tends to outweigh the pressure at the group level".

Also, I wonder if built in variability with social roles (e.g. a human might be a leader or follower for reasons NOT determined by genetics -- debatable, but I/ many others would hold that early childhood and culture might trump DNA in many important cases ) might alter the equations? Perhaps we evolve past genetic determinism in order to allow for larger group structures to feel the selection pressure more than individuals.

If I had another lifetime, I would study evolution enough to know what I am talking about.... Thanks for the interesting comment