The philosophical doctrine that certain matters are morally indifferent or that some things are neither good nor evil in themselves.
From Greek 'adiaphora' (indifferent matters) plus the suffix '-ism' (a doctrine or system of belief), creating a noun for the philosophical position or belief system.
Adiaphorism was controversial because it seemed to let people off the moral hook—'If this action is adiaphorous, I don't have to worry about it'—but philosophers used it to focus on what truly matters in ethics versus trivial concerns.
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