Achievements claimed: the human rights instruments, humane law reform, secular education, science-based medicine, and the humanist strand in abolition and tolerance. The harms: when secular confidence in remaking humanity turned coercive — the French Revolution’s Terror, and twentieth-century regimes that were atheist yet crushed the very dignity humanism centers — critics count these against the godless project as such. Humanists answer that manifesto humanism is defined by rights, democracy, and the individual, so those regimes broke its principles rather than applied them; but they concede the lesson that utopian confidence without limits is dangerous, and the later manifestos are written in that chastened voice.
SOURCES: Humanist Manifesto II (1973); Amsterdam Declaration (2002); J. Gray, Straw Dogs (2002)