What is the theme in Che Guevara: A Revolutionary Life by Jon Lee Anderson?

One of the themes of the book is the effect of environment on people and how people react to the environment. Che grew up in a comfortable apolitical environment. His family wasn't very interested in politics and his father was always on the sidelines of various events and not a major player. His father went from one failed business venture to another which is what gave Che his desire to succeed. As Che traveled around Latin America, he was exposed to the economic and social effects of imperialism.