The First Feature of Political Realism

I want to add another relavant knowledge on the basic feature of political realism.

Based on Hans Morgenthau's theory, political realism thinks that politics is conducted based on objective laws in each country. The word 'objective' is similar to the meaning of the word 'goal' or 'aim.' Thus, objective law is the law established to acheive aims or to follow policy in each country. Also he explains that each country's objective law is established based on their conception of humasn nature. Human nature is humasn beings' hypothetical condition in absence of government or rulers. Because the conception of humasn nature varys depending on societies, laws are different in each society in the world.