If we consider culture to be the collective expression of behaviors, then culture becomes the expression of genes, the embodiment of biology. Democracy becomes hence a biological feature of the likes of ginger hair or high average height, and can only be available in places where people carry the "democratic genes". Many such cases.

Now I didn't say that the democratic genes were better. In Christian ethics, the best to worst systems are monarchies, aristocracies, and then democracies. And I fully agree with this.