>The only thing that I am disagreeing with him on is whether "it is safe to assume that gender roles are baked into our DNA".

Ah, now I understand. You're practicing the common internet commenter behavior of picking out a single strongly worded statement and ignoring everything else the person said. Uncharitably reading my comments as "hurr durr women belong in the kitchen" instead of putting some faith in the author that they might have simply meant "hey, maybe it's not just a whim of culture that women are traditionally the caretakers in just about every single successful society." All because I didn't wrap a particular sentence in 3 paragraphs of qualifications and apologies.