alt Hacker NewsConsequentialism and to an extent Utilitarianism (since one is a subset of the other, it sometimes feels like philosophy is more concerned with naming things than explaining them but from the bit I've read those are the two biggest precursors).
AKA It's fine if I do locally horrible things if in aggregate I do more good than bad*
* by whatever metric of good I self select for - terms & conditions apply, much CO2 may be released.
It's funny, because as far as consequentialism, I feel like single-issue voters on all sides could use a bit more of that.
Of course, anything taken to extremes tends to get distorted.