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Built in 1991, the theoretical framework of Boltanski and Thévenot has often been considered as heteronomous, unconcerned about current sociological issues or at worst useless to understand those phenomena it aspires to. Nevertheless, it still remains an effective tool to understand how things, human beings, (inter)actions get organized. By means of the construction of a new “city” (a main political and philosophical logic), this text defends this postulate. He demonstrates that the grammar of justification allows to analyze current problems and federate environmental claims and actions undertaken too often outside the box.