Politics is not an exact science.

Attributed to Otto von Bismarck, the remark underscores a central feature of his reputation as a practitioner of Realpolitik: political judgment cannot be reduced to fixed laws or precise calculation. Unlike mathematics or physics, politics involves shifting alliances, incomplete information, public moods, and the unpredictable effects of decisions. The statement cautions against technocratic certainty and suggests that successful statesmanship depends on prudence, timing, and adaptability—qualities Bismarck repeatedly displayed in managing Prussia’s and later Germany’s domestic and foreign crises. It also implies a critique of ideological systems that claim to offer scientific certainty about political outcomes.