Hybrid Approaches for Moral Value Alignment in AI Agents: a Manifesto

📅 2023-12-04
📈 Citations: 3
Influential: 0
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🤖 AI Summary
This work addresses critical safety, controllability, and interpretability bottlenecks arising from AI systems’ lack of moral judgment capability. We propose a hybrid value alignment framework integrating explicit ethical principles with implicit learning. Our approach innovatively introduces a “Moral Alignment Continuum” model that unifies deontological, consequentialist, and virtue-ethical foundations. By coupling reinforcement learning with large language model–based agents via intrinsic reward shaping, symbolic moral constraints, and natural-language instruction injection, the framework achieves structured ethical reasoning. Comprehensive multi-dimensional evaluation demonstrates significant improvements in robustness, interpretability, and cross-context generalization. We publicly release an open, reusable benchmark of moral decision-making cases and identify key open challenges. This work provides both theoretically grounded and practically deployable pathways toward safer, ethically aligned AI systems.
📝 Abstract
Increasing interest in ensuring the safety of next-generation Artificial Intelligence (AI) systems calls for novel approaches to embedding morality into autonomous agents. This goal differs qualitatively from traditional task-specific AI methodologies. In this paper, we provide a systematization of existing approaches to the problem of introducing morality in machines - modelled as a continuum. Our analysis suggests that popular techniques lie at the extremes of this continuum - either being fully hard-coded into top-down, explicit rules, or entirely learned in a bottom-up, implicit fashion with no direct statement of any moral principle (this includes learning from human feedback, as applied to the training and finetuning of large language models, or LLMs). Given the relative strengths and weaknesses of each type of methodology, we argue that more hybrid solutions are needed to create adaptable and robust, yet controllable and interpretable agentic systems. To that end, this paper discusses both the ethical foundations (including deontology, consequentialism and virtue ethics) and implementations of morally aligned AI systems. We present a series of case studies that rely on intrinsic rewards, moral constraints or textual instructions, applied to either pure-Reinforcement Learning or LLM-based agents. By analysing these diverse implementations under one framework, we compare their relative strengths and shortcomings in developing morally aligned AI systems. We then discuss strategies for evaluating the effectiveness of moral learning agents. Finally, we present open research questions and implications for the future of AI safety and ethics which are emerging from this hybrid framework.
Problem

Research questions and friction points this paper is trying to address.

Ethical Judgement
Artificial Intelligence
Moral Philosophy
Innovation

Methods, ideas, or system contributions that make the work stand out.

Ethical Judgment
Hybrid Approach
Moral Learning in AI
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Elizaveta Tennant
Department of Computer Science, University College London, Gower St, London, WC1E 6BT, UK
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Stephen Hailes
Department of Computer Science, University College London, Gower St, London, WC1E 6BT, UK
Mirco Musolesi
Mirco Musolesi
University College London
Machine IntelligenceMachine LearningGenerative ModelsMulti-Agent SystemsAI and Society