The Phenomenon of Man is an essay by the French geologist, paleontologist, philosopher, and Jesuit priest Pierre Teilhard de Chardin. In this work, Teilhard describes evolution as a process that leads to increasing complexity, culminating in the unification of consciousness. The text was written in the 1930s, but it achieved publication only posthumously, in 1955.

Pierre Teilhard de Chardin was a French Jesuit, Catholic priest, scientist, paleontologist, theologian, philosopher, and teacher. He was Darwinian in outlook and the author of several influential theological and philosophical books. His mainstream scientific achievements included taking part in the discovery of Peking Man. His more speculative ideas, sometimes criticized as pseudoscientific, have included a vitalist conception of the Omega Point and the development along with Vladimir Vernadsky of the concept of a noosphere.