What is the derivation of morality and ethics in the Western world?
In the Western world today, all ideas about morality and ethics have, at the very least, been strongly influenced by the teachings of the Judeo-Christian religious tradition. There have been other influences, but at their root, Western morality and ethics are based in the teachings of the Bible.
This can be seen, for example, in the Western emphasis on the value of the individual. The Bible emphasizes that human beings are made in the image of God and that all life is sacred. This idea of individualism -- the idea that each person is valuable in their own right -- has become one of the major foundations of Western morality and ethics.
In the Western world morality and ethics are clearly established through the Judeo-Christian ethic. In the United States people came to this nation in order to secure freedom of religion. They were seeking refuge from religious persecution and these protections were later translated in the United Constitution and the development of the United States motto, "In God We Trust".
The Godly moral and ethical mores that began this country are still present today in the government and the laws that are enacted to treat people in a morally correct manner.