The notion of indifferentism became important in ecclesiastical usage in the 19th century, when it was used to designate pejoratively the religious and philosophical trends of modern times, especially of the Enlightenment, which rejected exclusive (dogmatic) forms of religion and ethics while accepting certain general principles. Indifferentism therefore may sum up the trends which allow more or less the same rights to the various forms of religion and ethics, and thereby leave them all without …