Although political errors are likely to be as old as politics itself, it is only in modern times – and I will suggest that it is only with Machiavelli – that the notion of political error clearly emerged on the background of other kinds of errors with which it has long been mingled. In an article entitled Morality and the social sciences, Albert Hirschman analysed the connection between morality and politics. He shows that there is a durable tension between the two. He writes: “modern political science owes a great deal to Machiavelli’s shocking claim that ordinary notions of moral behaviour for individual may not be suitable as rules for conduct for states.” Such an analysis invites to go back to the distinction between the different kinds of errors that can be done by humans with the goal of identifying the nature of those that can be specifically called “political errors”.