Marriage is a puzzle. Why does it exist at all?
Humans are a peculiar species, because it takes so long for our children to reach sexual maturity. This is because of the size of our brains. The overall development of human children is slowed in order for our brains, which are not only big but highly sophisticated, to grow and for us to learn enough to survive. And why do we need to learn? Because human society is massively complex and navigating it takes great skill and knowledge.
Even animals with similar omnivorous diets to ours like chimps, our near relatives, mature much more quickly. And the issue is not one of body mass; a bovine will grow to adulthood, five times the mass of a human, in 30 months. We are special in this regard.
The long time that human children are dependent produces a conundrum for males. On the one hand, the replication of our genes is well served by impregnating as many fertile females as we can. This is in line with behaviours readily observed in other species. On the other hand,