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This was after the First World War.
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The ways in which countries and states relate to one another was analysed when looking for answers to the conflict brought about by WW1.
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Took place between Idealists and Realists on how to deal with Nazi Germany.
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After WW2 IRs developed as US and Soviet Union powers disrupted the long established European centre of influence.
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Best known as Modern Realism. Edward Hallett Carr was a representative for Modern Realism as traditional historical methods were rejected.
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Neo-Realists adopted a scientific approach to IR, critiquing traditional historical ‘modern’ Realism such as “human nature”.
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Debate between Realist, Liberal and Marxist approaches to IR theory. Has also been previously recognised as the “Third Great Debate”.
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Waltz's theory interprets Neo-Realism with IR, taking a more scientific stance.
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Denied traditional concepts of IR with the emergence of new modern theories, known as positivism vs. post-positivism, as traditional and modern approaches towards science are discussed.
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Realism divided into 2 – offensive and defensive. Leading exponent during this period was John Mearsheimer as he proposed the theory of offensive Realism through “The Tragedy of Great Power Politics”.