Consequentialism, where morality is viewed through a lens of what happens due to human actions, is a major part of LessWrong. Utilitarianism specifically, where you judge an act by the results, is a subset of consequentialism and not nearly as widely accepted. Virtue Ethics are generally well liked and it's often said around here that "Consequentialism is what's right, Virtue Ethics are what works." I think that practical guide to virtue ethics would be well received.