I learned that [Trotskyism] were no different from the Stalinists, and they expelled me, which is the typical Marxist-Leninist way of dealing with dissenters. From that point on, I migrated by the 1950s into anarchism, increasingly emphasizing decentralization. Also, I made the all-important step of bridging my social philosophy with ecology. I did that in 1952 and went on to write a whole series of books developing an anarcho-ecological approach.