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On the inevitability of left-leaning political bias in aligned language models

2025/07/21 by Thilo Hagendorff, Hagendorff, Thilo · 1 voice · 2 citations
Medicine · Social Sciences · #Artificial Intelligence in Healthcare and Education #Computational and Text Analysis Methods #Ethics and Social Impacts of AI

paper · pdf · doi:10.1007/s43681-026-01235-8

Abstract

Abstract The guiding principle of AI alignment is to train large language models (LLMs) to be harmless, helpful, and honest (HHH). At the same time, there are mounting concerns that LLMs exhibit a left-wing political bias. Yet, the commitment to AI alignment cannot be harmonized with the latter critique. In this article, I argue that, insofar as they are trained to be harmless and honest under current alignment practice, intelligent systems will systematically exhibit what is measured as left-leaning political bias. Normative assumptions underlying alignment objectives inherently concur with progressive moral frameworks and left-wing principles, emphasizing harm avoidance, inclusivity, fairness, and empirical truthfulness. Conversely, right-wing ideologies often conflict with alignment guidelines. Yet, research on political bias in LLMs is consistently framing its insights about left-leaning tendencies as a risk, as problematic, or concerning. This way, researchers are actively arguing against AI alignment, tacitly fostering the violation of HHH principles.

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