The team at Digg have created a supercut of every on-screen death in the original Star Wars trilogy. The total number of deaths is 2,005,645,868, which is a number they got from Wookieepedia. The amount of death becomes numbing over the course of the three minute video. Many of the deaths are Imperial, but the bulk of the grand total is innocent people on Alderaan, which was about 2 billion. The running count and music are really great touch.
If you like watching things die (you weirdo), we've got several more supercuts you might like: