The Torah reading לֶךְ-לְךָ Lech Lecha (“go forth,” Genesis 12:1–17:27) introduces us to Abram, a descendant of Shem, who God calls to leave his homeland in Ur of the Chaldeans and to emigrate to Canaan. This is the start of the Abraham, Isaac and Jacob historical trilogy.
This trilogy is so important to the understanding of the Torah that God introduces Himself to future generations as the “God of Abraham, Isaac and Jacob.” And Yeshua (Jesus) taught that this name for the Almighty is a key witness of the resurrection to come.
And Lech Lecha also introduces us to the evils of Sodom and Gomorrah (Genesis 13-14), which may have more to do with inhospitality than other offenses.