Il ruolo della razionalità estesa nella teoria della giustizia di Amartya Sen

This paper explains the important topic of human rationality in Sen’s theory of justice and in social choice theory. The concept of rationality in the contemporary utili tarianism is still seen in the old sense of the maximization of self-interest. This definition is strongly criticized by Amartya Sen, who proposes a reconfiguration of this concept. The first part of the paper analyzes the notion of rationality pro posed by the indian economist. Sen’s goal is to bring to gether ethics and economics. The outcome of the first part will be useful to understand the limits of Sen’s capabilities approach described in the second part.