Structural realism is a branch of realism in international relations that emphasizes the role of the international system in shaping the actions of states. Structural Realists Argue that the structure of the international system, including the distribution of power and the balance of power, determines the behavior of states.

Structural realism is based on the belief that states are motivated by their own self-interest and that they act in pursuit of their own security and prosperity. However, structural realists argue that the international system constrains the behavior of states and shapes their actions.

Structural realists believe that the international system is characterized by anarchy, meaning that there is no central authority to enforce rules or resolve conflicts between states. They argue that states must rely on their own power and resources to protect their interests and ensure their security, and that they must be prepared to use force if necessary to defend themselves.

Structural realists also argue that the distribution of power and the balance of power are key factors in shaping the actions of states. They believe that states seek to maximize their own power and influence, and that they are willing to cooperate with other states when it serves their interests.

The distribution of power or Balance of power refers to the distribution of military, economic, and political power among states in the international system. It is an important concept in international relations, as it can shape the behavior of states and the dynamics of international relations.

The distribution of power can be measured in a variety of ways, including through the size and capabilities of a state's military, the size and strength of its economy, and its political influence and power. States with more military, economic, and political power are generally seen as more influential and powerful in the international system, while states with less power are seen as less influential and powerful.

The distribution of power can also change over time, as states gain or lose military, economic, or political power. Changes in the distribution of power can have significant implications for the behavior of states and the dynamics of international relations.

Overall, the distribution of power is an important concept in international relations, as it can shape the behavior of states and the dynamics of international relations. It is often used to analyze and understand the relationships between states and the balance of power in the international system