Mazdeism, also known as Zoroastrianism, is one of the oldest religions in the world. Having originated in ancient Persia, it is based on the teachings of the prophet Zoroaster. Synonyms for Mazdeism can include Zoroastrianism, Zarathustrianism, or Parsiism. Mazdeism puts great emphasis on ethical behavior, the eternal struggle between good and evil, and the worship of Ahura Mazda, the supreme deity. The religion's core beliefs include the notions of free will, the afterlife, and the interconnectedness of all things. Mazdeism has had a profound influence on various spiritual traditions and continues to hold a significant place in the cultural history of the Persian civilization.