The Balance of power is the oldest concept that originated early modern period in Europe. Balance of Power emerged as a universal principle as well as the solution to the problem of every war in international history. Every country used it as an instrument to protect their nation from their enemy countries. Definition of Balance

Idealism is one of the schools of thought in the theory of international relations that focuses on international cooperation, morality, and institutions rather than strict national self-interest. Idealism emerged immediately after World War I, mainly through the works of President Woodrow Wilson of America. Wilson’s idealistic thought occupied his Fourteen Points speech, which was designed

Realism is one of the predominant theories of international relations. Realism emphasizes that the international system is anarchic, with no overarching authority to regulate interactions between sovereign states. States act to ensure their security and survival in this anarchic environment. There are debates within realism about how states pursue security and power. Defensive realism argues

Neorealism emerged as an influential theory of international relations during the early 1980s. The biggest contributor to neorealism was Kenneth N. Waltz, who published the landmark book Theory of International Politics in 1979. This work gave a scientific and systematic approach to classical realist theory, which became known as structural realism or neorealism. Waltz expanded

In studying international relations, there are two big theories called realism and neorealism. Both are theories that focus on the self-interests of countries and the power of states in global issues. They believe in making decisions based on reason. Realism started after World War II and is linked to people like Hans Morgenthau and E.H.