Every brand of religion maintains, and is, a permanent mechanism for transmitting ideas and values - whether one regards those values as admirable or ridiculous. Secularist organizations, with their generally looser, nonhierarchical structures, lack the power to hand down and disseminate their heritage in such a systematic way.
Freethinkers: A History of American Secularism (ed. Metropolitan Books, 2005) - ISBN: 9781429934756