”We’re basically monkeys” is a bad argument when monkeys share child rearing duties IF they have resource abundance, as do other animal species. Pair bonding is a term to search for here, this is a really well-studied question. I again don’t want to parrot experts badly. Sapolsky is again a great popsci level resource here. Interestingly, parental investment is also correlated with long reproductive cycles such as humans. It makes sense I guess.

But please don’t let “human is just smart monke” turn into some naturalist fallacy wherein men must be manly because we were made so. We weren’t, but given a stressful environment, we CAN turn out that way.