Is philosophy everybody's business?

Actually, yes, philosophy is everybody's business because being a person means having the tendency to philosophize. Every one of us, actually, every day, to some degree engage in some philosophical thoughts, because as I said before, we're only human and it's like an instinct. In fact, philosophical ideas embody everyone's thoughts, so, yes, since everyone thinks, knows and has a tendency to bring up philosophy in their everyday lives, philosophy is everybody's business.