I doubt this "most animals" thing. evolution is incremental, and AFAICT it most often adds adaptation layers that can add flexibility to override behaviors that were previously inflexible. there's a well-known divide between the reptilian mind and the bulkier mind we've grown, but I'm pretty sure there must be many more layers than that, underneath and within each conceptual layer, because of the way such things evolve. we humans are not that special a species as we make ourselves to be. it's just that, as in a game of monopoly, minute random differences end up driving increasingly disproportional outcomes