Kurt Lewin was an early 20th century psychologist who is credited with popularizing the field of social psychology and pioneering work in group dynamics and organizational psychology
He identified three specific climates of leadership: 
  1. Authoritarian leadership creates a division of labor while remaining uninvolved in the labor action. The role of the leader is to evaluate the actions of subordinates and oversee the outcome.
  2. Democratic leadership works in collaboration with staff to arrive at decisions. Input is gathered from all involved, with the leader offering expert advice and experience. Any evaluations and assessments are objective and based in fact and contribute to a climate of respect.
  3. Laissez-faire leadership assumes no clear leadership role, offering advice and input only when asked. This type of climate lacks structure and provides very little assessment or feedback from the leader.