    Sentence 1: Lockean ideas provided the footing  for American behaviorism, launched by John  ‘Watson in the early 1900s and built by B. F.  Skinner into a powerful mid-century theoretical  force heralding the supremacy of environment  in its belief that behavior is shaped by external  stirmnuli    Sentence 2: The theoretical force was mostly  due to John Watson more so than B. F. Skinner.