Islam is the second largest religion in the world after Christianity. As a monotheistic faith that originated in the Middle East, Islam holds many beliefs and practices in common with Judaism and Christianity.
One monotheistic religion that predated all these religions is Zoroastrianism. Founder by Zoroaster (also known as Zarathustra), Zoroastrianism arose in Persia and was the state religion of Persia until the 7th century CE when it was replaced by Islam.
As a brief guide of the similarities and differences between Islam and Zoroastrianism, the following chart compares the statistics, origins, history and religious beliefs of these two faiths.