The liberal IR theory that carries forward the basic arguments of the classical liberal theory is basicaly concentrated on the individual as the unit of analysis. This has led to a different view than the state-centric mentality of realism and brought forward the idea of pluralism in actors of IR besides the nation-state. Another feature is the faith in the power of human mind and universal values of liberalism that shall bring global peace. This is generally why the theory is called idealist and in some cases even criticized to be utopian.