John Howard Moore (December 4, 1862 – June 17, 1916) was an American zoologist, philosopher, educator, humanitarian and socialist. He is considered to be an early, yet neglected, proponent of animal rights and ethical vegetarianism, and was a leading figure in the American humanitarian movement. Moore was a prolific writer, authoring numerous articles, books, essays, pamphlets on topics including animal rights, education, ethics, evolutionary biology, humanitarianism, socialism, temperance, utilitarianism and vegetarianism. He also lectured on many of these subjects and was widely regarded as a talented orator, earning the name the "silver tongue of Kansas" for his lectures on prohibition.