Why atheism is mental illness.

When you look back on the greatest civilizations in history, none of them were atheist by any stretch. Atheist outliers would be shunned from the tribe.

The Babylonians, Mesopotamians, Romans, Egyptians, Greeks were all pagans and mostly wrong in their beliefs. They were smart and healthy enough to not even consider atheism as the state religion. It didn't even cross their collective mind. Not even registered.

Many tragic events happened during the Christian periods because of heresy and Roman prosecution, but not even the greatest of heretics went down the path of godlessness. He was simply not apathetic enough. Or brainwashed.