Part 1 of Essay
Nowadays, in our rapidly changing society, many established principles of action and standards of judgment are inapplicable. Therefore, the principle of morality is necessary for people to guide themselves to resolve the conflicts rationally. Morality is often classed as a respect for manners and customs. The moral actio ....

Part 2 of Essay
.... is also the standard for people to evaluate for happiness. Most of the source for morality is evaluate by many moral theories. Those theories show the conduct of right and wrong, and command people for a proper behavior. Toward most of the moral theories, the best known theory to define morality is utilitarianism. The approach of utilitarianism is that for what is useful is consider to be good, and the ethical value of conduct is determined by the utility of its result. According to the utilitarianism, wh ....