Its prob hard wired into our DNA which manifests itself different ways with, invention, adventure, conquest, beliefs, etc etc, some become paranoid as it could come through that way on a certain amount of the populace, its how we became smarter by questioning things even as simple as the smallest, daftest questions ever asked, and makes us different from the other mammals on the planet. But i usually find the real paranoid ones are drug users (stoners) and anti vaxers