It posits that one natural catalyst for shifts in culture is population growth.  
The author of this work was influenced by de Tocqueville, who is quoted extensively throughout it. The preface to this work states that social improvement requires "patient work through incremental change." It posits that one natural catalyst for shifts in culture is population growth.  Ostensibly an analysis of the "new middle class", this work posited three character types, "inner directed", "outer directed" and "tradition directed",  explaining how culture changes their relative prominence. Co-written with Nathan Glazer and Reuel Denney, this is -- for 10 points -- what study of the changing American character, written by David Riesman?
The author of this work was influenced by de Tocqueville, who is quoted extensively throughout it.
The Lonely Crowd