Grant: group selection does happen, but only very slowly. Natural selection works when its units are destroyed, and tribes go extinct pretty rarely compared to individuals.
Merely being poor does not make a selection unit unfit, as far as evolution is concerned. It has to disappear.
Grant: group selection does happen, but only very slowly. Natural selection works when its units are destroyed, and tribes go extinct pretty rarely compared to individuals.
Merely being poor does not make a selection unit unfit, as far as evolution is concerned. It has to disappear.