Neorealism (international relations)

Neorealism or structural realism is a theory of international relations that emphasizes the role of power politics in international relations, sees competition and conflict as enduring features and sees limited potential for cooperation. The anarchic state of the international system means that states cannot be certain of other states' intentions and their security, thus prompting them to engage in power politics.

Source: Wikipedia — Neorealism (international relations) (CC BY-SA 4.0)