A system or belief emphasizing strict adherence to doctrine; the practice or advocacy of basing thought and action on established doctrines.
From doctrine + -ism (Greek -ismos 'practice or system'). This is a straightforward formation meaning the practice of valuing doctrines highly.
Unlike the negative-sounding 'doctrinairism,' the neutral 'doctrinism' is rarely used—suggesting our language has already picked sides, with vocabulary choices that make rigid doctrinal thinking sound worse than it might deserve.
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