Having rejected reason, we will not expect ourselves or others to behave reasonably. Having put our passions to the fore, we will act and react more crudely and range-of-the-moment. Having lost our sense of ourselves as individuals, we will seek our identities in our groups. Having little in common with different groups, we will see them as competitive enemies. Having abandoned recourse to rational and neutral standards, violent competition will seem practical. And having abandoned peaceful conflict resolution, prudence will dictate that only the most ruthless will survive.
In short we will act like children.
This has the spiral dynamics pre/post fallacy written all over it.

