This intellectual history interprets recent American business management ideas as political theory, describing their underlying assumptions about power and value. According to Stephen Waring, most business management theory descends from either Frederick Taylor's 'bureaucratic' theory of scientific management or Elton Mayo's 'corporatist' idea of human relations. Waring discusses the subsequent evolution of several management theories and techniques, including organization theory, computer simulation, management by objectives, sensitivity training, job enrichment, and innovations usually attributed to the Japanese, such as quality control circles.