Many philosophers believe that morality consists of following precisely defined rules of conduct, such as "don't kill," or "don't steal." Presumably, I must learn these rules, and then make sure each of my actions live up to the rules. Virtue ethics , however, places less emphasis on learning rules, and instead stresses the importance of developing good habits of character , such as benevolence (see moral character ). Once I've acquired benevolence, for example, I will then habitually act in a benevolent manner. Historically, virtue theory is one of the oldest normative traditions in Western philosophy, having its roots in ancient Greek civilization. Plato emphasized four virtues in particular, which were later called cardinal virtues : wisdom, courage, temperance and justice. Other important virtues are fortitude, generosity, self-respect, good temper, and sincerity. In addition to advocating good habits of character, virtue theorists hold that we should avoid acquiring bad character traits, or vices , such as cowardice, insensibility, injustice, and vanity. Virtue theory emphasizes moral education since virtuous character traits are developed in one's youth. Adults, therefore, are responsible for instilling virtues in the young.