Hahah. No, I'd actually argue the opposite. "Common sense" is often rooted in believing things which aren't true because of primitive emotional responses. Many things that impact the world are quite uncommon and even counter-intuitive and it takes careful consideration, an improved epistemology, and tools like the scientific method to get reproducible results.

Peace on earth is utopian. I'd settle for most people not openly supporting the initiation of violence. There will always be aggressors in the world. I'm for the best mechanisms for dealing with them.