A belief that something (like a religion, group, or ideology) is superior and that people should only follow it to the exclusion of all others.
From 'exclusive' + '-ism.' The '-ism' suffix denotes a comprehensive belief system or ideology that advocates for exclusive devotion to one thing.
Religious exclusivism—the belief that only one faith holds truth—is actually rare historically; most ancient religions were okay with people believing in multiple gods, so exclusivism is a more modern and specific kind of thinking.
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