If the U.S.A. Quips the U.N.

As a permanent member of the Security Council the U.S.A. has veto power. Without U.S. membership there would likely be a lot of votes condemning the United States or the interests of friendly nations such as Israel that the U.S.A. has supported in the past.

The U.N. could perpetrate quite a lot of wickedness without adult supervision (joking). Being a member of the U.N. is an opportunity to defend oneself in person; self-defense is important. Without a U.N. ambassador from the U.S.A., the U.S.A. would in effect be convicted in absentia after the trash talking had taken full swing.