> The analogy is certainly not perfect Why not? Because this is exactly right. Note that all sexually reproducing organisms are like this: a single individua

> The analogy is certainly not perfect Why not? Because this is exactly right. Note that all sexually reproducing organisms are like this: a single individual cannot reproduce. And for social animals like humans, a single mating pair cannot reproduce in the wild. (If you doubt this, watch a couple of episodes of "Naked and Afraid.) The minimal viable reproductive unit for humans is a tribe or village of a few dozen individuals.