What Is a Conspiracy Theory?

A new fringe conspiracy theory group called QAnon has been making headlines. It's a far right conspiracy theory, not based on any truth. Not all conspiracy theories are false and not all are as like weird as say the theory that Elvis Presley is still alive or that we never landed on the moon. Thruline goes through three periods in American history when conspiracy theories played a critical role: The colonial era, the prohibition era, and the Vietnam War era.