In Parashat Vayera we cease to deal with individuals and begin to deal with nations. God “muses aloud” about whether to confide in Avraham the upcoming destruction of the nearby metropolis of S’dom. It is no coincidence that the destruction of S’dom is foretold in the very passage in which God speaks of Avraham’s descendants’ doing what is just and right. But why does Avraham then try to oppose God’s justice?