Utilitarianism is an ethical philosophy where actions are morally right if their consequences make people happy. It can be contrasted to deontological ethics where actions are right if they adhere to rules, and virtue ethics which emphasizes people's character.
Ian Montgomerie's Utilitarian FAQ is one of the clearest and most comprehensive introductions to utilitarianism, but it went offline and the author does not seem to be reachable. Below is a mirror link to this FAQ.
This document is solely provided as a reference to students of moral philosophy. Any political or religious view that might be expressed do not necessarily reflect my own opinion or the opinions of my organization. Check out other ethical philosophies or find out the ethical philosophers you might like.