The so-called “long 19th century”, from the French Revolution to the First World War, ranks as the crucial phase in the genesis of the modern world. In the Western countries this period was characterized by the differentiation of the public and the private spheres, the birth of the modern bureaucratic state and the delegitimation of early modern practices such as clientelism and patronage. All these fundamental changes are, among other things, usually considered important preconditions for the modern perception of corruption.This paper will concentrate on this crucial phase by means of a comparative analysis of debates in France, Great Britain and the United States, with the aim to elucidate the motives for major anti-corruption movements. The questions are: who fights against corruption and what are the reasons for doing so? I will argue that these concerns were often very different and sometimes accidental. Furthermore, an analysis of political corruption may reveal differences between the political cultures in the countries in question. Thus, the history of corruption serves as a sensor which enables a specific perspective on politics. By taking this question as a starting point the focus is narrowed to political corruption and the debates about corruption, while petty bribery on the part of minor civilservants, as well as the actual practice in the case of extensive political corruption, is left aside.