With a low speed, high drag dial-up I'm not about to see it. But Plato's "Republic" deals with what happens to a pure democracy...
The timocracy (honor-loving) society degenerates into the money-grubbing oligarchy (rule by the few); then comes the democracy (the herd) where license and thoughtlessness prevail; and when all is gone to rack and ruin, the people want a strong man--who becomes a tyrant.
"The Republic" is a hell of a read, if tough in spots. And a damn dangerous book, especially in these times.