Humanist Manifesto I, II and III

The Humanist Manifestos are primary documents issued by the American Humanist Association across three successive statements over the twentieth and early twenty first centuries, each revising and updating the movement's own stated principles rather than being a fixed single text. As a primary source these are the strongest possible evidence for what organized Humanism has formally affirmed at each stage, since they are the movement's own successive self-definitions rather than an outside description of it. The atlas does not give this composite entry a single publication year precisely because it spans three distinct documents issued decades apart, and a reader wanting to know what changed between them, and why, should consult a source that compares the three texts directly rather than treating them as one unchanging statement.