Paranoia Strikes Deep

Why people believe in conspiracies

After a public lecture in 2005, I was buttonholed by a documentary filmmaker with Michael Moore-ish ambitions of exposing the conspiracy behind 9/11. "You mean the conspiracy by Osama bin Laden and al Qaeda to attack the United States?" I asked rhetorically, knowing what was to come.

"That's what they want you to believe," he said. "Who is they?" I queried. "The government," he whispered, as if "they" might be listening at that very moment. "But didn't Osama a...