Epigenetic Factors as 'Creative' influence in Evolution

So behavior can be explained by genes? Interesting.
So can this also predict pathology/psycosis? Or is this still to early to tell?

Thanks PR, for that thoughtful answer, I have always been interested in whether the environment of the early African savannah drove early hominids to take advantage of the adaptations and processes that led to bipedal locomotion for instance. Now I have a whole new perspective.