Constructivism is a structural theory of the international system that makes the following core claims: (1) states are the principal units of analysis for international political theory; (2) the key structures in the states system are intersubjective rather than material; and. (3) state identities and interests are in important part constructed by these social structures, rather than given exogenously to the system by human nature [as (neo)realists maintain] or domestic politics [as

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