In reply to jonnienomates: You could try her on the songs of Bertolt Brecht (set to music by Kurt Weil, among other composers). You'd need to find versions sung in English translation: singer Robyn Archer did a two-volume set in the 80s that may still be available. Your daughter would have to be able to see past the old fashioned operatic style, which might be hard for a youngster, but then they were my favourites as a kid (no, really!).
Brecht was a committed marxist writing at the time of the Weimar republic, who later fled Germany coz of the Nazis. So his songs cover both your big topics, indeed show the links between them in a more human way than any textbook. They perfectly capture the era, and for a single body of work give an almost unmatched insight into the political turmoil, the forces of right and left, and the effects on ordinary people.
OK, it's not 'light', but then the era really wasn't.