This document provides a comparative study of the three Abrahamic religions: Islam, Christianity, and Judaism. It summarizes their origins, histories, core beliefs and teachings. The three religions originated in the Middle East and share some common figures like Abraham and Moses, but have key differences in their beliefs around figures like Jesus and religious texts. Their global adherents number in the billions, with most Muslims located in the Middle East, Southeast Asia and Africa, most Christians in Europe and Americas, and most Jews in Israel.