The Smithsonian Magazine has an interesting piece up about Georg Elser, the man who almost single-handed killed Hitler in the early days of World War II.
His bomb went off less than 15 minutes too late.
When someone says that one person (or a few people) would be no match against the power of the government (should it turn tyrannical), tell them about Georg Elser and how he, acting completely alone, nearly decapitated Nazi Germany in 1939.
Sadly, Elser was shipped off to a concentration camp, and executed shortly before the end of the war.
Read the whole thing.