This lost classic was first published anonymously in 1902 by the Social Science Club of Philadelphia, whose members included Voltairine de Cleyre, Mary Hansen, Natasha Notkin, and other Mutualists, Individualists, and Communists from the Philadelphia social movement. The “Catechism,” drafted by Hansen and finished by the Club collectively, presents a dialogue on the fundamentals of Anarchistic philosophy; discusses the commonality and the disagreements among Socialist, Individualist, Communist, and Mutualist forms of Anarchism; and offers a pluralistic, experimental vision of the free society, in which free people can try out any peaceful economic arrangement, and in which a wealth of Anarchistic economic systems peacefully co-exist, compete, and flourish side-by-side.