Leadership Theories in 20th Century By gvmcmillan Period: Jan 1, 1850 to Dec 30, 1920 Frederick Taylor: Scientific Managment Theorist Mar 20, 1856 F.W. Taylor is born Sep 3, 1868 Mary Parker Follett is born Period: Sep 3, 1868 to Dec 18, 1933 Mary Parker Follett: Postscientific Managment Theorist Period: Dec 26, 1880 to Sep 7, 1949 Elton Mayo: Founder, Human Relations Movement Jan 1, 1883 Frederick Taylor put in charge of Midvale Steel's new machine shop Period: Nov 7, 1886 to Jun 7, 1961 Chester Barnard: Pioneer of American Management Dec 1, 1889 Taylor leaves Midvale Steel Dec 1, 1898 Taylor joins Bethlehem Steel Sep 1, 1901 Follett serves as President Teddy Roosevelt's management consultant Dec 1, 1901 Taylor forced to leave Bethlehem Steel over management disputes. Period: Dec 1, 1904 to Dec 1, 1990 Robert Greenleaf: Servant Leadership Period: Dec 1, 1906 to Dec 1, 1954 Douglas McGregor: Theory X & Y Apr 1, 1908 Abraham Maslow is born Period: Apr 1, 1908 to Jun 8, 1970 Abraham Maslow: Psychology & Motivation Dec 1, 1911 Taylor writes Principles of Scientific Management Jan 1, 1912 US Congress investigates Scientific Management Mar 21, 1915 Frederick Taylor dies Period: Dec 1, 1924 to Dec 1, 1932 Hawthorne Studies Dec 1, 1933 Mayo publishes "The Human Problems of an Industrialized Civilization" Dec 18, 1933 Mary Parker Follett dies Dec 1, 1938 Barnard publishes Functions of the Executive. Dec 1, 1943 Maslow publishes "A Theory of Human Motivation" Dec 1, 1960 McGregor publishes "The Human Side of Enterprise" Dec 1, 1964 Victor Vroom publishes "Expectancy Theory" Dec 1, 1965 Maslow publishes "Eupsychian Management" or "Maslow on Management" Jun 8, 1970 Abraham Maslow dies Dec 1, 1971 Path-Goal Theory created by Robert House Dec 1, 1977 Greenleaf publishes "Servant Leadership" Dec 1, 1978 Transformational Leadership Theory developed by James MacGregor Burns