humanity principle

The principle of humanity is one of the foundational pillars of international humanitarian law (IHL) and a core tenet of the International Red Cross and Red Crescent Movement. In IHL, it operates alongside the principles of distinction, proportionality, and military necessity to constrain the conduct of hostilities. Its essence is captured in the Martens Clause, first introduced in the preamble of the 1899 Hague Convention (II) and later reaffirmed in Additional Protocol I (1977) to the Geneva Conventions, which provides that in cases not covered by treaty law, civilians and combatants remain under the protection of "the principles of humanity and the dictates of public conscience."

Operationally, the principle prohibits the infliction of suffering, injury, or destruction not actually necessary to accomplish a legitimate military purpose. It underpins specific rules such as the ban on weapons causing superfluous injury or unnecessary suffering (codified in Article 35(2) of Additional Protocol I) and the obligation to collect and care for the wounded and sick regardless of which side they belong to (Geneva Convention I, Article 12).

As one of the seven Fundamental Principles adopted by the 20th International Conference of the Red Cross in Vienna in 1965, humanity is defined as the desire to "prevent and alleviate human suffering wherever it may be found" and to "protect life and health and to ensure respect for the human being." It is the principle from which the others — impartiality, neutrality, independence, voluntary service, unity, and universality — are said to flow.

The International Court of Justice invoked the humanity principle in its 1996 Advisory Opinion on the Legality of the Threat or Use of Nuclear Weapons, treating it as part of the "intransgressible principles of international customary law." For Model UN delegates and researchers, it is most commonly cited in debates on weapons regulation, civilian protection in armed conflict, and humanitarian access.