All of Suess's "political" books are great. "The Butter Battle Book" is basically a reenactment of the cold war, "Yurtle the Turtle" was criticism of dictators (specifically Hitler), and "Horton hears a Who" was about America's Anti-Semitic stance during the holocaust. (They even took a national vote to send jewish refugees back to germany.) In the Horton story case, he was stating that no matter how "unimportant" a group of people seem to be, their voice needs to be heard. Some also believe that this could've been commentary on the rebuilding of Japan after the bombing of Hiroshima.
....Let's not forget that Suess was a political cartoonist during WW2, as well.
However, The Lorax is a personal favorite because it tears me up almost every time.
Edited by Audori, 31 July 2009 - 10:46 PM.