Gregory Bateson (1904-1980), anthropologist, psychologist, systems thinker, student of animal communication, and insightful environmentalist, was one of the most important holistic thinkers of the twentieth century. Noel G. Charlton offers this first truly accessible introduction to Bateson's work, distilling and clarifying Bateson's understanding of the "mind" or "mental systems" as being present throughout the living Earth, in systems and creatures of all kinds. Part biography, part overview of the evolution of his ideas, Charlton's book situates Bateson's thought in relation to that of other ecological thinkers. This long-awaited volume opens up this challenging thinker's body of work and introduces it to a new generation of readers.