The complete four-volume set of the 'World's Greatest Thinkers' Series; Man and Man: The Social Philosophers, Man and the Spirit: The Speculative Philosophers, Man and the State: The Political Philosophers, and Man and the Universe: The Philosophers of Science.
Actually, I read only the Meditations of Stoic philosopher Marcus Aurelius Antoninius. He was certainly a highly principled man and a venerated warrior and Emperor. Book One begins, "From my grandfather Verus I learned good morals and the government of my temper."
Perhaps a wide reading of his seventeen dictums for living a good and honorable life in the 6th or 7th grade would lead to a kinder, gentler society.
Nine other social philosophers are in this book, Man and Man.
This 4 book set is from my Father's modest library.