On the other hand, maybe the only population size sufficient to have a high level of concurrence in thought is 1 individual. Maybe there are weird effects going

On the other hand, maybe the only population size sufficient to have a high level of concurrence in thought is 1 individual. Maybe there are weird effects going on with individual preferences as population gets small. Consider you and a spouse deciding on dinner, you want pasta they want tacos. Complete disagreement. Imagine you now have a kid, they want tacos too. Maybe given the population size, you soften your convictions on the pasta, and opt for the tacos since the majority is leaning that way. A phenomenon like this, whether it is real or not, would screw up the small pop is more agreeable model, for example.