Realism as a tradition of thought in political theory has been a perennial approach and it can be traced back for more than two millennia. However, as Donnelly (2000, p1) remarks, “the link between realism and international theory is especially strong in the twentieth century”, being a dominant theory before and after the second World War and then declining after the end of the Cold War. Furthermore, as he points out, realism is not a fixed theory but rather a “general orientation” bounded by “a set of recurrent concerns and conclusions” (p1). In order to properly grasp what could be understood by a so-called realist tradition, it is essential that we first pay attention to classical political writers that have been associated with realist idea as this will give us a better comprehension of how the world is seen through the Realist prism. Afterwards, we will briefly look at self-declared 20th century realists and try to assess the relevance of this theory in the post cold-war era. In ancient political thought realist ideas can be fond in the writings of a number of authors, both in western and oriental political thought, most notably the Greek historian Thucydides, the Chinese military general Sun Tzu and Kautylia (also know as Chanakya), the adviser of the first Maurya emperor. The Melian dialogue is arguably the most relevant passage of Thucydides’ History of the Peloponnesian war for understanding realist international politics. The powerful city of Athens attacks the small colony of Melos that was allied with Sparta. The Melians argue that it is unjust as they have not been hostile to Athens. The Athenians reply that ‘the standard of justice depends on the equality of power to compel’ and ‘the strong do what they have the power to do and the week accept what they have to accept’ (Thucydides, 1972, 406). We can thus see how power is a cardinal factor in the realist conception.
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