The Nature of Man Series is a four-volume series of works in paleoanthropology by the prolific playwright, screenwriter, and science writer Robert Ardrey. The books in the series were published between 1961 and 1976. The series majorly undermined standing assumptions in social sciences, leading to an abandonment of the "blank slate" hypothesis; incited a renaissance in the science of ethology; and led to widespread popular interest in human evolution and human origins.