John B. Watson (1913) and B.F. Skinner (1956) both argued that humans, and human behavior, are part of the natural world on a continuum with other living species and their behaviors. Recognizing this continuum facilitates progress toward the scientific goal of behaviorism which both Watson (1913) and Skinner (1953) identified as the prediction and control of behavior. Understanding continuum of behavior across species and behaviorism’s scientific goal of prediction and control has important implications for identifying and understanding basic principles of behavior and for the continued success of applied behavior analysis and the experimental analysis of behavior. (PsycINFO Database Record (c) 2019 APA, all rights reserved)