Hoberman and Deliverance

I just finished reading the excellent book, "The Dream Life: Movies, Media, and the Mythology of the Sixties," by J. Hoberman. But I was disappointed the book didn't mention "Deliverance," which struck me as the ultimate Vietnam War era artifact, in that it took place during that period but had so few specific details that it could almost have taken place at any time. Also, Deliverance would fit into Hoberman's political themes since it features the sort of upscale suburban Southerners who were crucial to the political transformations of the 1960s and 70s. (But I've only read the book, haven't seen the movie, so maybe the film version doesn't fit into Hoberman's story, I dunno.)