According to realism theory, states are considered the primary actors in global politics because they are the most significant and dominant agents in the international system. Realists view states as rational and self-interested entities that seek to maximize their power and security, and they believe that states are in constant competition with one another for power and resources. Additionally, realists see the international system as anarchic, meaning that there is no central authority to regulate interactions between states. In this context, states must rely on their own capabilities, such as military might, economic prowess, or diplomatic influence, to secure their interests and survive in the international system. Realists argue that states are the only actors with the ability to shape international affairs and influence global outcomes through their actions and policies.