In Judaism, Christianity, and Islam, Abraham is a venerated patriarch whose relationship with God provides the foundational story for God's beneficial relationship with humanity. According to biblical tradition (and some say myth), Abraham (c. 20th century BCE) was born in or near the city of Ur in Mesopotamia, most likely in southern Chaldea. Abraham (originally named Abram), married his half-sister, Sarah (originally named Sarai) and began a long journey from Mesopotamia to Haran, and then later to Canaan and Egypt. Detailed in the book of Genesis, chapters 12–25, Abraham's name comes to mean "Father of a multitude" and/or "the friend of God." His journey, as depicted in the Bible, is a long and dramatic one, with Abraham and Sarah encountering many different cultures, customs, and people groups along the Fertile Crescent from Mesopotamia to Egypt.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Abraham,_the_Patriarch/.