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Law

The Principle of Complementarity in International Criminal Tribunals

Quick fact

The ICC can only intervene if a state is 'unwilling or unable' to genuinely prosecute the most serious international crimes—this is why less than 1% of cases end up at the ICC, with states handling the vast majority themselves.

Why this is interesting

Why can the International Criminal Court prosecute crimes only when national courts fail? The answer lies in a principle designed to respect state sovereignty while still preventing impunity.