Zoroasrianism, the religion of a people group known as the ______, included beliefs in ethical dualism in which the universe was in a cosmic struggle between Ahura Mazfa, the god of good and truth, and Ahriman, the principle of evil and darkness; humans were allowed to choose sides and in the end, a Last Judgment would result in the rewarding of those following Ahura Mazfa and the punishment of those loyal to Ahriman