>>424> Has academic philosophy, for example, changed social behavior?Yes. If you weren't historically illiterate you'd have never asked since you would know about the Cold War between communists and capitalist, feminism, and now SJWs.
Philosophy was highly important in the Quantum revolution, in the Relativity revolution, neurology, etc.
Is most of philosophy of any use to common people? No, not really. Is it useful in general? Yes, quite a lot. Once you know the ways of thought, you can see the flaws in your own system of thoughts and that of others'.