Darwinian theorists say that our obsessive selfishness is programmed into our genes. No disagreement there. We know that. The Bible describes the effects of the fall as pervading everything. This would include the genetic level.
But they hypothesize that the reasons for this selfishness is survival and procreation. Our genes want to save themselves.
Well, frankly, this doesn’t do our selfishness justice. There is a deeper depravity at work. We don’t want to merely survive; we want to subjugate. We don’t merely want to procreate; we want to possess. Down to our very genes, we want to rule our world and be worshiped by others. Our genes aren’t merely selfish. They have a God delusion.