Evolution and Ethics and Other Essays by Thomas Henry Huxley is a collection of essays written in the late 19th century. The central focus of this work is the relationship between evolutionary theory and ethical principles; particularly how scientific understanding can inform moral considerations in human society. Huxley was known for coining the term agnosticism, a philosophical position asserting that the existence of a deity is unknowable and unprovable, rather than a strict rejection of a higher power like atheism.