@doc phil,
Observationally, we do have conflict. Indeed, beyond humour, conflict is one of the commonest default positions. Why?
I consider it to be related to the sense that the world can be better. It remains illogical to have poverty in such a developed civilisation, and the drive to push humankind forward often finds a place to be through antagonistic progression. Also we have limited awareness of why we are here, what is the human purpose. Is it shared? Is it individual? Is it both?
People want to be individual, but also want to fit in. Disagreement allows someone to be unique (for a moment), and when the other engages the conflict, one is unique and also belongs. It is an unsustainable way of achieving the manifestation of a natural drive. Waffling is another way!!