Josiah Warren (/ˈwɒrən/; June 26, 1798 – April 14, 1874) was an American social reformer, inventor, musician, businessman, and philosopher.
He is regarded as the first American philosophical anarchist; he took an active part in Robert Owen's experimental community at New Harmony, Indiana, in 1825–1826. Later, Warren rejected Owenism, giving birth to the Time Store Cooperative Movement (historically known as "Equity Movement"). His ideas were partly implemented through the establishment of the Cincinnati Time Store, followed by the founding of the Utopian Community of Modern Times. In his 1863 work titled True Civilization, Warren outlines his philosophy founded on the "sovereignty of every individual." In his subsequent development, Practical Applications of the Elementary Principles of True Civilization (1873), he proposes a decentralized hexagonal ideal city, drawing inspiration from J. Madison Allen of Ancora design. The city was supposed to be the antithesis of communism, being owned by cellular units while promoting equitable distribution and a system of time chits.