
That obligation (termed the “obligation to protect”) is everywhere in modern human rights law. Consider a few examples of how decisionmakers prescribe, invoke, or apply it:
► Under the Convention on the Rights of the Child, states must take measures to protect children from “physical or mental violence…while in the care of parent(s).”
► Non-refoulement prohibits states from returning people home if there is a risk of third-party harm. A state that deports someone despite that risk typically does not participate in the abuse. Rather, the deporting state fails to satisfy an obligation to protect.
► The International Court of Justice (bottom right) has interpreted the Genocide Convention to require states to protect people from acts of genocide committed by or in another state.
► The concept of responsibility to protect posits: (1) that each state must protect its population from certain atrocities, including atrocities committed by third parties; and (2) if one state fails to satisfy that obligation, it shifts to the international community.
► The International Law Commission (below left) has proposed a rule rendering states responsible where they delegate authority to an international organization that then violates rights. (photo credit) Under the proposal, a delegating state would be responsible even if the abuse were attributable only to the international organization.
In each of those examples, the state must protect someone from third-party abuse.

Though the obligation to protect is prevalent, no generalized framework exists for appraising when states have it or what it requires.
First, whether a state has the obligation depends on its relationship with the (actual or potential) abuser.


Second, obligations to protect depend on the kind of harm caused. States must protect only against conduct that:
Finally, a state that has the obligation — because of its relationship with the third party and the severity of the harm — must take reasonable measures to restrain the third party. Reasonableness depends on context, but several factors inform whether particular measures are reasonable: