Introduction
The subject of war is a profound and enduring theme in human history, often studied through political, historical, and social lenses. However, a crucial dimension for understanding modern conflict is the legal and ethical framework that attempts to regulate it. Since the mid-20th century, international law has developed significantly in an attempt to limit both the outbreak and the brutality of war. These notes will provide an overview of the key principles governing the resort to and conduct of armed conflict, focusing on the concepts of ‘Just War’ theory and the contemporary international legal system.
The ‘Just War’ Tradition
The Just War tradition is a philosophical and ethical framework, with roots in ancient thought and Christian theology (e.g., Augustine and Aquinas), that seeks to provide a moral guide to warfare. It is not a single doctrine but a set of criteria that have influenced international law. It is traditionally divided into two parts.
Jus ad Bellum (Justice of resorting to war)
This concerns the justification for going to war in the first place. For a war to be considered just, several conditions must typically be met:
- Just Cause: The most widely accepted just cause is self-defence against aggression. Other potential causes, such as humanitarian intervention to prevent genocide, are more controversial.
- Right Intention: A state must be fighting for the just cause and not for ulterior motives like territorial gain or economic advantage.
- Last Resort: All peaceful and viable alternatives to resolving the dispute must have been exhausted.
- Proper Authority: The decision to go to war must be made by a legitimate, constituted authority, not by private individuals or groups.
- Reasonable Prospect of Success: A war should not be fought if it is futile and there is no chance of achieving the just cause.
- Proportionality: The overall good expected from the war must outweigh the harm and destruction it will cause.
Jus in Bello (Justice in the conduct of war)
This concerns the rules of conduct once a war has begun, regardless of whether the war itself is just. The primary aim is to limit the suffering and destruction. The main principles are:
- Discrimination: Belligerents must distinguish between combatants and non-combatants (civilians). Attacks must only be directed at military targets. Intentionally targeting civilians is a war crime.
- Proportionality: The force used in a specific military action must be proportional to the military advantage sought. An attack that would cause civilian losses excessive in relation to the concrete and direct military advantage anticipated is prohibited.
The Modern Legal Framework for War
The principles of the Just War tradition are reflected in modern international law, particularly in the framework established after the Second World War.
The United Nations Charter
The UN Charter is the foundational treaty of modern international relations regarding the use of force. Article 2(4) contains a general prohibition on the "threat or use of force against the territorial integrity or political independence of any state" (United Nations, 1945). However, the Charter provides two main exceptions to this rule:
- Self-Defence: Article 51 preserves the "inherent right of individual or collective self-defence if an armed attack occurs against a Member of the United Nations". The scope of this right, particularly whether it permits pre-emptive strikes against imminent threats, remains a significant area of legal and political debate.
- UN Security Council Authorisation: Under Chapter VII of the Charter, the Security Council can authorise collective military action to "maintain or restore international peace and security". This is the legal basis for UN-mandated military interventions.
International Humanitarian Law (IHL)
IHL, also known as the law of armed conflict, is the body of law that corresponds to jus in bello. Its primary sources are the Geneva Conventions of 1949 and their Additional Protocols. These treaties establish detailed rules for the protection of those not taking part in hostilities (civilians, medical personnel) and those who are no longer participating (the wounded, prisoners of war) (ICRC, 1949). Key prohibitions under IHL include murder, torture, the taking of hostages, and attacks on civilian infrastructure. Breaches of these rules can constitute war crimes.
Conclusion
While the reality of war is often brutal and chaotic, it is not a legal vacuum. A complex framework of ethical principles and international laws exists to regulate its commencement and conduct. The UN Charter aims to prevent war by prohibiting the unilateral use of force, while IHL seeks to mitigate its horrors by protecting civilians and limiting the methods of warfare. Although the enforcement of these rules is often challenging and subject to political manipulation, their existence provides a critical standard against which the actions of states can be judged and a foundation for pursuing accountability for atrocities.
References
- International Committee of the Red Cross (ICRC). (1949) The Geneva Conventions of 1949 and their Additional Protocols. Available at: https://www.icrc.org/en/war-and-law/treaties-customary-law/geneva-conventions (Accessed: 18 May 2024).
- United Nations. (1945) Charter of the United Nations. Available at: https://www.un.org/en/about-us/un-charter/full-text (Accessed: 18 May 2024).
