A man or woman who devotes themself to there cause, and often does not expect anythin for what they are doing, therefore becoming a hero.
William Wallace, who devoted his life to gaining Scotlands independence, and became a national hero. (see william wallace
Superman, man who is invincible and wears his pants on top of his trousers, constantly saves metopolis from evil.
Batman, man with no powers, just lots of hi-tech gadgets, but still saves Gotham city, from evil
Spiderman, man with radioactive spider bite, uses his spider powers to defeat the evil forces that attack New York