The recent US attack on Iran’s nuclear sites has prompted renewed questions about whether the UN charter’s prohibition on the use of force is meaningful.
Considered one of the keystones of international law, article 2(4) of the charter specifically forbids member states from using force – or threatening to do so – against the territorial integrity or political independence of another state, or “in any other manner inconsistent with the Purposes of the United Nations”.
A significant amount of commentary exists about what the prohibition entails. This tries to clarify ambiguities around the terms “force”, “threats of force”, “territorial integrity” and “political independence”. Although no absolute consensus has been reached, it is commonly thought that member states are prohibited from launching armed attacks against other states, or threatening to do so, unless acting in self-defence or with the authorisation of the UN security council.
