In this work a critique is made of the studies on the evolution of language by means of its definition. The epistemic basis is studied beginning with the definition of language and the unit of evolution. The limit that the study on language evolution is considered to be the understanding of what is to be human. The result is to refer us from the question about the origin of language to the question about the origin of the human being. In this way, we understand the studies on the evolution of language are about the process of how we recognize ourselves as humans.