Changes

Realism is a theory that claims to explain the reality of international politics. It emphasises the constraints on politics that result from humankind's egoistic nature and the absence of a central authority above the state.<ref>[https://www.e-ir.info/2018/02/27/introducing-realism-in-international-relations-theory/#:~:text=Realism%20is%20a%20theory%20that,central%20authority%20above%20the%20state. Introducing Realism in International Relations Theory] by Sandrina Antunes and Isabel Camisão, February 27, 2018</ref>}}

Realism is a theory that claims to explain the reality of international politics. It emphasises the constraints on politics that result from humankind's egoistic nature and the absence of a central authority above the state.<ref>[https://www.e-ir.info/2018/02/27/introducing-realism-in-international-relations-theory/#:~:text=Realism%20is%20a%20theory%20that,central%20authority%20above%20the%20state. Introducing Realism in International Relations Theory] by Sandrina Antunes and Isabel Camisão, February 27, 2018</ref>}}