Can a non-violent social movement be effective and remain non-violent in the face of a repressive empire?

Ted Rall is a syndicated political cartoonist for Andrews McMeel Syndication, WhoWhatWhy.org and Counterpoint. He is a frequent contributor to The Wall Street Journal, a graphic novelist and author of many books of art and prose, and an occasional war correspondent. He is, recently, the author of the graphic novel "The Stringer."