Please let there be no argument for we are brothers
lot and Avraham had alot of possetions therefore they could not dwell in the same land.
There was an argument between Avraham and Lots herdsmen - and the canaanites and the perizzites were then dwelling in the land. And Avraham said "Please let there be no arguments between our herdsmen for we are brothers"
So Avraham and Lot decided to splitt the land Avramm said "if you go left I will go right an if you go right then I will go left"