Bono
A singer and songwriter who has used his celebrity to become an activist, fighting worldwide hunger, poverty and disease
Tadao Ando is a committed environmentalist. An architect with no formal training, he's probably best known for the Church of Light in Osaka, Japan. It features no ornament, but when light hits it, the rays form a cross that moves depending on the mood of the sun.
Erik Lie
A college professor whose published report exposed the widespread company practice of backdating stock options
I nominate Dr. Ignacio Ponseti. He developed a superior method for treating clubfoot, one that does not...