(Reminds me of our Motown discussion.) I never taped D's lectures. Only offering a caveat, an assertion I can't prove. So my grain of salt advice could be taken with a grain of salt.
Szasz marketed himself as a progressive activist when seeking to advise me on Political Sociology thesis material. I still have a pub from him on the corporate industrial - org crime connection in illegal toxic waste disposal, with paid-off gov oversight officials looking the other way. At least we agree he isn't progressive, but everyone isn't on the same page as us:
http://news.ucsc.edu/2011/08/szasz.html
http://www.sourcewatch.org/index.php?title=Andrew_Szasz
The whole U. marketed itself as progressive up 'til the end of the '80's, it functioned as a 'hippy holdover' activist ghetto for the UC system (more than UCB, which was a lot bigger and more diverse, with a nastier crowd-control police force). But the grisly ultra-right underbelly of the institution was provided by Regents appointed by Govs Raygun and Deukmejian. The swinish G. Lease's hit-piece (S.C. Sentinel) on HisCon alum H. P. Newton, immediately after his murder in Oakland, was a good case in point.
By '90 the U had a 'United Colors of Benetton' - looking marketing campaign for prospective new students, they bull dozed elfland, they built Nat Sci #umpteen. It was interesting watching Fusari inveigh against student trail bike riders for the erosion harm they were causing on-campus, while 6 inches of topsoil was washing down into the parking lot of her new Environmental Studies digs at the brand new college 8 site. All three of the night proctors at the old 8 dorm-space in Porter were Birchers, one of whom had a metal arm prosthesis due to a bottle-bomb experiment he had misperformed when younger. Grisly underbelly.
Profs from the E.S. Dept could also be divvied up into good (Pepper, Cooley, Curry, O'Connor) vs misrepresentational (Lease, Farrell, Letourneax, Fusari). I never gave Gliessman's AgroEcology a shot, but the sustainable Ag co-op was good.
Some stellar profs of that time were the Smiths for His Con, King for of World Religion, Rotkin for Mass Media and Comm., Aptheker for Women's Studies, Collett at the Arboretum, half of the Soc. Dept, half of the E.S. Dept. Sluggo's surly hippy staffers were a riot. I'll still spare a coin for the seal statue's nose below nat sci 1.