The humanist strand of management thinking that celebrates teams and collaboration through respect for customers and workers as human beings has a long and distinguished history. It includes Mary Parker Follett (1920s), Elton Mayo and Chester Barnard (1930s), Abraham Maslow (1940s), Douglas McGregor (1960s), Peter Drucker (1970s), Peters and Waterman (1980s), Katzenbach and Smith (1990s), and Gary Hamel (2000s).