This document discusses the definition and functions of religion. It defines religion as the belief in and worship of a controlling supernatural power, often containing moral codes. The two main types are monotheistic, believing in one god, and polytheistic, believing in many gods. Five major world religions are described briefly: Christianity, Judaism, Islam, Hinduism, and Buddhism. The document then outlines several social functions of religion, such as socializing values and moral codes, encouraging collective worship and group unity, attributing sacred qualities to societal aspects, preventing normlessness, and relieving stress from life events.