Protection of Civilians from Autonomous Weapon Systems under International Humanitarian Law
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International Humanitarian Law Principles and Autonomous Weapon Systems
International Humanitarian Law (IHL) sets out key principles to protect civilians during armed conflict, including distinction, proportionality, and precautions in attack. Autonomous Weapon Systems (AWS), which can select and engage targets without direct human intervention, challenge the application of these principles due to their reliance on algorithms and sensors rather than human judgment Homayounnejad2017Yucel2023Usmanov2022+6 MORE.
Distinction Between Civilians and Combatants
A central requirement of IHL is the distinction between civilians and combatants. Many studies highlight that AWS may struggle to reliably distinguish between military targets and civilians, especially in complex or dynamic environments. This inability increases the risk of unlawful attacks on civilians and civilian objects Yucel2023Usmanov2022Sinyaeva2021+5 MORE. The lack of human oversight in real-time decision-making further complicates compliance with this principle Homayounnejad2017Usmanov2022Egeland2016+1 MORE.
Proportionality and Precautions in Attack
IHL also requires that attacks not cause excessive harm to civilians relative to the anticipated military advantage (proportionality), and that all feasible precautions are taken to minimize civilian harm. AWS may not be able to make the nuanced, context-dependent judgments required for proportionality assessments, as these often involve unquantifiable factors and ethical considerations Homayounnejad2017Yucel2023Usmanov2022+4 MORE. The unpredictability and speed of AWS actions can make it difficult to implement effective precautionary measures Homayounnejad2017Yucel2023Usmanov2022+6 MORE.
Human Control, Accountability, and Due Diligence
The concept of "meaningful human control" is widely discussed as a potential safeguard to ensure AWS operations remain compliant with IHL. However, as AWS become more autonomous, the ability of commanders to exercise effective oversight and make informed decisions about civilian risks diminishes, increasing the likelihood of unforeseen targeting errors Homayounnejad2017Usmanov2022Egeland2016+2 MORE.
Legal responsibility for AWS actions is another major concern. If an AWS makes an error resulting in civilian harm, determining whether due diligence was exercised during its development, deployment, and use is critical. States and individuals may be held responsible if failures in due diligence lead to unreasonable risks to civilians Jain2023Usmanov2022Akkuş2022.
Regulatory Gaps and the Need for New Rules
There is currently no universally accepted definition or comprehensive regulation of AWS under international law, leading to significant legal and ethical gaps Usmanov2022Nnamdi2023Dremliuga2020+2 MORE. Many experts argue that existing IHL presupposes responsible human agency, which is difficult to translate into algorithmic decision-making Egeland2016Dremliuga2020. Some propose developing new rules to clarify the scope of AWS use, ensure human oversight, and address accountability, rather than imposing outright bans Usmanov2022Dremliuga2020Akkuş2022.
Conclusion
The protection of civilians from AWS under IHL is challenged by the systems' limited ability to distinguish, assess proportionality, and take precautions without human judgment. The lack of clear regulations and the difficulty in ensuring accountability further complicate civilian protection. Strengthening legal frameworks, clarifying the role of human control, and developing new guidelines are essential steps to address these challenges and uphold the core principles of IHL in the age of autonomous weapons Homayounnejad2017Jain2023Yucel2023+7 MORE.
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