The visceral reaction against the idea of physically harming someone to save lives comes from the amygdala and orbital cortex.

The utilitarian thinking that would save the greatest number of lives is computed in a part of the frontal lobe called the dorsolateral prefrontal cortex.

The temporopariental junction and do’s plater also prefrontal cortex grew tremendously over the course of evolution, and give us the wherewithal to perform cool calculations that seem certain kinds of violence justifiable.

-Steven Pinker, The Better Angels of Our Nature, pg. 507

Nox and his