Cumulative Record. Chapter 45: John Broadus Watson, Behaviorist. Quote 6

The same taste for polemics led him into an extreme environmentalistic position . . . Like all those who want to do something about behavior, he had emphasized the possibility of environmental modification, and this was widely misunderstood. Under the stress of battle he was led at last to the well-known cry: “Give me a dozen healthy infants, . . .” (p. 603)