Selected Timeline of the Social History of Participatory Action Research (PAR) Methodologies

Selected Timeline of the Social History of Participatory Action Research (PAR) Methodologies
(Slightly adapted from a timeline I developed on my Carleton University web page (2003) to complement and share my PhD comprehensive exam).  
1913 Moreno, Dr. Jacob Levy, (1889-1974) originated psychodrama, sociodrama, role training, sociometry, group psychotherapy. Moreno left Vienna and moved to America in 1925. [...]