“So Lot chose for himself the whole plain of the Jordan and set out toward the east. The two men parted company: Abram lived in the land of Canaan, while Lot lived among the cities of the plain and pitched his tents near Sodom.” When Abram surrendered his rights (he was the elder, after all) and let Lot choose, he probably knew that Lot would choose the better land. He must have known Lot’s character and temperament well enough to guess his choice. But Abram left the outcome to God. It seems like Lot got the better end of the bargain here in chapter 13, but if you know the end of the story, you know Abram was actually the winner. The well watered plains of Jordan came with a wicked pair of cities whose moral corruption would infect Lot’s family. Abram didn’t know this, or I think he may have cautioned Lot. But God knew and by divine intervention Lot chose what was best–for Abram.
Reading: Genesis 13