Zoroastrianism originated in ancient Persia and was founded by Zoroaster. It was the world's first monotheistic faith, believing in one supreme god named Ahura Mazda. Zoroastrianism is a dualistic faith that sees the universe as an eternal battle between good and evil. Humans are responsible for choosing good over evil through their thoughts, words, and deeds. After death, souls are judged and sent to either heaven or hell based on their choices in life. Today, small Zoroastrian communities still exist in India but face threats of disappearing due to a low birth rate and restrictions on conversion.