The wisdom of philosophy is in modern times mostly delivered in the form of books. But, in the past, philosophers sat in market squares and discussed their ideas with shopkeepers or went into government offices and palaces to give advice. It wasn’t abnormal to have a philosopher on your payroll. Philosophy was thought of as a normal, basic activity, rather than as an esoteric, optional extra. Nowadays, it’s not so much that we overtly deny this thought, but we just don’t have the right institutions set up to promulgate wisdom coherently in the world.