George Stuart Fullerton (1859-1925) was an American author. His works include: The Conception of the Infinite.. (1887), On Sameness and Identity (1890), On the Perception of Small Differences.. (1892), On Spinozistic Immortality (1899), A System of Metaphysics (1904), An Introduction to Philosophy (1906), The New Realism (1908), The World We Live in (1912), Why the German Nation has Gone to War (1915), Germany of To-day (1915), The Truth About the German Nation (1915) and A Handbook of Ethical Theory (1922).