The Iranian prophet Zoroaster (also known as Zarathustra) is an important figure in the ancient religion of Zoroastrianism. He is believed to have lived in the 6th century BCE and is credited with founding the religion, which is still practiced today. Zoroaster's teachings focus on the concept of dualism, the idea that there are two opposing forces in the universe, good and evil. He also taught that humans have free will and can choose between these two forces. Zoroaster's teachings have had a lasting influence on many other religions, including Judaism, Christianity, and Islam.