Yes, genes are important for understanding our behavior. Incredibly important - after all, they code for every protein pertinent to brain function, endocrinology, etc., etc. But the regulation of genes is often more interesting than the genes themselves, and it's the environment that regulates genes.

I used to very politely say that if there is free will then it's in all sorts of boring places, like whether you're going to pick up this or that fork as you begin your meal. There really is none: It's all biology.

I think it is inevitable that we make Us/Them distinctions but there's nothing inevitable about who counts as a Them.

Robert Sapolsky Quotes