Are nonviolent solutions always the best solutions?

When discussing the town's reaction to his defense of Tom Robinson, Atticus tells Scout in Chapter 9 of TKaM, " '...you just hold your head high and keep your fists down...Try fighting with your head for a change..."(p.101) Why or why shouldn't people resist violence in all cases and at all costs? Feel free to use any anecdotal evidence from the novel, non-violent resistance movements in history (led by Gandhi, MLK), and your own experience to support your opinion. Write a paragraph of at least five sentences and then respond to two classmates in at least one well-written sentence for each.