Religions!
Religion is about a group of people who set certain beliefs and practices. Today we have many religions that were made from five major religions: Hinduism, Judaism, Buddhism, Christianity and Islam. This religions can be monotheism(believe in one god) and polytheism(believe in many gods).
One of the first major religion is Hinduism. Hinduism doesn't really have founder but it was developed over time. During that time (750 B.C- 500 B.C). Hindu teachers begin to create many texts called Upanishads. The Hindu believed in Karma(what comes goes around) and reincarnation(you are reborn into a new life). Hinduism is polytheism because they believe in three gods: Brahman(the creator), Vishnu(the protector) and Shiva(the destroyer). It's three gods in one.
Buddhism developed off Hinduism because the founder Siddhartha Gavtama wanted to escape human suffering, find his inner self and seek enlighten. Siddhartha tried to many methods but finally found it in meditating. Siddhartha was and is still known as The Buddha because he started teaching his noble Four Noble Truths. The Fourth Noble Truth was all about Nirvana. Nirvana was all about achieving the perfect state of mind and releasing selfishness. Buddhism didn't hold very strong in India, because Hinduism was so, much bigger, but it spread all China, Korea, and Japan by Nuns and traders.
Judaism and Christianity have about the same beliefs because they both believe in one god, have a bible, and apostle(s) and have The Ten Commandments. Judaism came before Christianity.
Abraham was choose by Yahweh(Judaism God) to be the father of Hebrew people, to spread the word about the Hebrew religion(Judaism was know as the Hebrew people before they became Judaism). Hebrews later receive there Ten Commandments through Moises. Its the base to the Hebrew religion. The Hebrew people went through a lot of suffering so later unite and create a new kingdom called Israel.
Later in 6 to 4 B.C Jesus is Born in Bethlehem. At age 30 he starts preaching about Christianity and performs miracles. The Hebrew begin to follow him. Jesus later dies for people sins and apostle Paul is left to preach about it. Paul later declares it open for converting. It became wide world spread within the years. The Jews begin to rebel against Christianity but it falls for the many reasons that Christianity became world wide STRONG. Christianity was all about having a personal relationship with a loving god and promising eternal life after death. Constantine was a Roman emperor who had a vision on the symbol for Christianity(A Cross) and helped make it an official religion in the Roman Empire.
Islam happened between Judaism and Christianity. The Islam people believe in one god: Muhammad. The Islam people are also known as Muslims. It all started with a prophter, his wife, and close friends. Muslims have five pillars; faith, prayer, alms, fastening, and pilgrimage.. There leader died at age 62, two years later after he started the Islam religion. The Muslims way of life is no pork, intoxicating drinks, Fridays afternoons is for communal worship, apply religion to everyday life and Muslims must worship all directly. The holy book of the Muslims is Qur'an