Human Relations and Behaviouralism:
Between the World War 1 and World War 2, it was realized that workers are human beings and their dignity should be maintained while on the job. The human relations movement which began in the 1927-1932 was accompanied by Hawthorne Studies by Elton Mayo, F. J. Roethlisberger, T. N. Whitehead, and W. J. Dickson to determine the optimum level of lighting to get the most production from workers. Afterwards research into the behaviour of workers in their job environments got support from Chester Barnard, Frederick Herzberg, Douglas McGregor, Abraham Maslow, and others brought change in the handling and treatment of workers by the managers.