This article conducted a bibliographic review to present an analysis of the category of liberty in the writings of Karl Marx, from 1841-1844. It situates the need for an analysis of liberty to conduct an ethical reflection and shows the importance of Marxian criticism for the deconstruction of a liberal ideal that links private property to a defense of individual interests. By revealing this factor, it looks at the tie between liberty and non-alienated work, which refers to the horizon of a new sociability. The paper reflects on the need for a repositioning of this critical perspective for the interpretation of the first principle of the professional code of ethics of social worker, to affirm the proposals of the ethical-political project of Social Work in Brazil.
Liberty; Ethics; Private property