Abraham grew up in Ur Kasdim, the cultural center of Babylonian civilization whose people had built the Tower of Babel. He turns his back on this culture to begin a new existence and provide an alternative to the norms of this society.
Abraham is first mentioned in the Tanakh in Genesis, chapter 11 as he is about to set off to Canaan with his family. We are not given any biographical information about his life until this point, but we do know about the culture he is leaving.