Abstract
Young proposes an extremely important definition of social groups, which champions the flexible nature of the concept over attempts to freeze and fix the content of groups' identity on a cultural basis. Young shows an increasing disaffection with claims for groups' legislative presence that results in the abandoning of an essential definition of groups and the promotion of an analytical one. This entails that social groups remain the instruments to acknowledge and reproduce patterns of injustices, yet mechanisms to enhance effective inclusion of marginalized groups do not depend on political mobilization around groups' shared backgrounds. This increasing rejection of social groups as privileged instruments of political mobilizations leads me to elaborate an Arendtian `inessential coalition', viewed as the development of Young's reworking of the concept of social groups