The fallacy of judging past societies, actions, or norms by the standards of the present, or conversely, of justifying outdated, harmful practices by arguing "that was normal at the time." In its dismissive form, it's used to invalidate modern moral critiques of historical figures by claiming a lack of historical context. More perniciously, it's used to defend the persistence of antiquated injustices by appealing to their historical commonality.
Example: Defending a founding father's slaveholding by saying, "It was normal then, you can't judge him," commits the Historical Normality Bias. It uses historical descriptivism ("it was common") to avoid moral judgment, implying that collective moral failure excuses individual participation in atrocity.
by Dumu The Void February 4, 2026
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