Utilitarianism is the philosophical school that says you should always aim to bring about the greatest total good, even if a few people get hurt along the way, so if there’s really no other way to save those five lives, go ahead and push. Other philosophers believe that we have duties to respect the rights of individuals, and we must not harm people in our pursuit of other goals, even moral goals such as saving lives. This view is known as deontology (from the Greek root that gives us our word duty).
