Edward Greenberg's publications on workplace democracy and participation include his 1986 Workplace Democracy: the Political Effects of Participation.  The book's introductory chapter, "The Democratic Left and the Appeals of Workplace Democracy," is a refreshingly comprehensive ontology of the appeal to specific people, relative to the literature's more common all-inclusive "why cooperative?" openings.

If you happen to be reading the study from a self-help perspective, and you're wondering "am I in the democratic Left?"  Greenburg understands it to mean that you

 - advocate full-democratization of decision-making in society, including public control of the economy
 - advocate greater equity in the distribution of material goods than we have now
 - reject Marxist-Leninist "vanguardism"
 - dismiss the idea of a post-revolutionary bureaucratic elite