John Howard Moore (1862–1916) was an American zoologist, philosopher, educator, and social reformer. Born near Rockville, Indiana, he spent his youth across the American Midwest, living in Missouri, Kansas, and Iowa. He pursued higher education at Oskaloosa College, Drake University, and the University of Chicago, graduating with a degree in zoology in 1896. During his academic years, Moore underwent a profound intellectual transformation, rejecting Christianity, adopting vegetarianism, embracing socialism, and advocating for temperance.
Based in Chicago, Moore worked as a high school teacher while actively writing and lecturing. His literary and philosophical output focused heavily on animal ethics, humane education, and evolutionary biology. In his landmark 1906 work, The Universal Kinship, Moore synthesized Darwinian evolutionary theory with ethical philosophy, arguing for a secular ethic that extended the Golden Rule to all sentient beings based on their evolutionary connection to humans. His advocacy aligned him with organizations like the Chicago Vegetarian Society and the British Humanitarian League.
Throughout his career, Moore published several influential books, including Why I Am a Vegetarian (1895), The New Ethics (1907), and Savage Survivals (1916). His writings on animal protection and humanitarianism attracted a notable readership, including figures such as Mark Twain, Jack London, Clarence Darrow, and Eugene V. Debs. Despite his intellectual achievements, Moore suffered from chronic illness, pain, and depression, ultimately ending his own life in Chicago's Jackson Park in 1916.
