A Handbook of Ethical Theory is a philosophy manual for university students by George Stuart Fullerton. Fullerton was an American philosopher and psychologist. Excerpt: “We have seen that Butler viewed justice, veracity and regard to common good as virtues accepted among men everywhere. But we may also see, if we look into his pages, that he neglected to point out that there may be the widest divergencies in men's notions of what constitutes justice, veracity and common good. And men differ widely on the score of the degree of emphasis to be laid upon their observance.”