P.S. - The exhibit does flesh out the depth of Woody's material. The exhibit does show the range of topics that Woody commented on.
Canoer's comments are probably reflect the way the general public recognizes Woody - labor songs and This Land. We could probably start a long debate on whether there are social causes worth fighting for these days. In my opinion basic social reform has made changes since Woody's day but we are all growing fat and lazy and missing the battles that still need to be fought. We need Woody Guthrie's to point out these issues instead of today's singer-songwhiners complaining of how they can't get laid (or whatever they are singing about).
If you have a chance, and you can find it, pick up the book "Woody Sez" and you will see first hand how this man's mind worked. Incredible.