drug dealer, vietnam veteran, new york city, taxi, pornography, obsession, taxi driver, 1970s, pimp, observer, firearm, politician, alienation, junk food, misanthrophy, vigilante, political campaign, cynical, illegal prostitution, urban decay, character study, loner, manhattan, new york city, meditative, neo-noir, child prostitution, complex, new hollywood, dreary, cautionary, drives, provocative, antagonistic, audacious, callous,