If we consider ourselves his “children” by having similar trust in God, we should follow his way. Lot chose the easy way, but that was not Abram’s way. Why did Abram go to war? Who are these kings? What is the story behind the story? Does God have anything to do with this?
Just as Nimrod tried to unite people into one nation whose evil inclinations are propelled by endless innovation, people will try to unite again. Just as God confounded Nimrod’s confederation, God will confound the Babylonian confederation again. This is one of the lessons of the book of Revelation.