Certainly not all behavior is the direct result of genes; I don't think this is the common viewpoint. For example there are genes that enable learning. This is

Certainly not all behavior is the direct result of genes; I don't think this is the common viewpoint. For example there are genes that enable learning. This is extremely useful since disseminating behavior by learning is much faster than doing it through evolution. The rapid changes in human behavior in the last few decades (at least) can be explained in this way, and not by natural selection which is too slow. Genes that encode specific behaviors are just the simplest possible mechanism that works, and they do account for a vast number of phenomena. I think Occam's razor applies: If you suggest a more complicated mechanism, you should have some supporting evidence.