Sikhism is a distinct religion that was founded by Guru Nanak in 15th century India. It believes in one God and teaches the equality of all people and religions. Sikhs follow the teachings of 10 Gurus and consider the Guru Granth Sahib as their spiritual guide. Some key beliefs and practices include monotheism, equality of men and women, keeping uncut hair which is covered by a turban, and serving the community through seva or volunteer work.