- classical realism harks back to 5th century BCE Greek historian Thucydides and his account of the Peloponnesian War. - It recognizes the central role of power in politics of all kinds, but also the limitations of power and the ways in which it can readily be made self-defeating - Realist tradition reached its nadir in neorealism - Kenneth Waltz, father of neorealism, was unsuccessful in his effort to transform realism into a scientific theory (=neorealism) - Neorealism is a parody of science. Its key terms like power and polarity are loosely formulated and its scope conditions are left undefined - Decline of neorealism was hastened by the end of the CW, which appeared to many as a critical test case for a theory that sought primarily to explain the stability of the bipolar world. The end of the CW and subsequent collapse of the USSR also turned public attention to a new range of political problems to which neorealism was irrelevant