When I think of common sense, I think of "Forrest Gump." He's the embodiment of folk wisdom. And while "common sense" is good, I believe common sense has its limitations. We need something more than common sense to help us navigate the complexities...
I think we are all idiots. At least, to some degree. We all suffer from faulty critical thinking skills. Sometimes this is from pride, other times, we just don't know how to think about thinking...