I know this is a flip dismissal.

But it illustrates one of my deeply held beliefs pretty well: there are things that are virtuous at small scale that are disastrous at large scale, and vise versa.

In society "othering" out-groups leads to many wrongs. But it's hard to argue there's much evil in cultivating a sense of family pride. The vice turns to virtue at very small scale.

I believe in giving more help to those who need it. But does that mean I should skip Christmas presents for my kids because there are people starving in [insert poor country or war zone]? The virtue becomes vice at small scale.

A unified theory of moral behavior is actually hard to come by.