The Amsterdam Declaration is humanism's nearest thing to a creed, and it is deliberately built to be revisable — adopted at the first World Humanist Congress in 1952, revised at the fiftieth anniversary in 2002, and revised again at the seventieth in Glasgow in 2022. The 2022 text opens by claiming a long history rather than a founding moment, describing modern humanism as the culmination of long traditions of reasoning about meaning and ethics. Its four sections commit humanists to being ethical, to being rational, to seeking fulfilment, and to meeting the human demand for meaning without dogma or authoritarianism. It is adopted by member organisations rather than assented to by individuals, which is the structural difference between a declaration and a confession of faith.