Poligamy is a natural as anything else concerning marriage. We are somewhat wired for that. We are somewhat wired for a lot of things, but our choices are always somewhat limited by perceived societal needs and cultural limitations of the day, as in what can a society seem to afford, or not. Culture is G_D . The supreme court ruling on Homosexual marriage is not much different than the one child law in China , or if the supreme court were to actually rule in favor of polygamy. Our collective cultural consciousness believes we can tolerate less controls on homosexual behavior(which we are all wired for) , probably because we have the most nukes and lots of immigrants and don’t need more replacement people anyway.