Broadly speaking, how much of human behavior can be attributed to our genes? How much can be attributed to our culture or society? How much to other factors?
I think that some can be - ADHD, for example, is more than a mere behavioral problem. Don't get me wrong, I have several friends with ADD, which means a large majority of my friends have it.
But quite a lot of it is through environment and personal choice.
Specifically, to what extent, if any, does religious behavior have a genetic basis?
That's worth a separate thread in itself.
Personally (I will readily admit I have no evidence for this stance, just opinion) I think that religious behaviour, such as seeing God and visions and so forth, is a neurological function of the brain. It explains why some people never have visions, and others have quite a lot of them. It also explains why religion, in all of it's forms, is so prevalent throughout the world, regardless of their social contact with other cultures.
Whether this experience is due to genetics, a brain deficiency on my behalf, or on the behalf of a religious person, or even as part of a response to local environment, I would not venture to guess.
Again, specifically, to what extent, if any, does sexual behavior have a genetic basis? Are the social roles of men and women more decided by their genes or more decided by society?
Another question worth a separate thread.
I wouldn't pretend to know much about this though, but I would say that it is defined by society. Different societies define different roles for their men and women, and this would certainly have an effect on sexual behaviour.