What are the primary themes of Three Cups of Tea?

Greg Mortenson's story as told in Three Cups of
Tea is significant for several reasons, and these reasons translate into its
primary themes. This is certainly not an exhaustive list, but these ideas should get you
started:

Perseverance in the face of adversity - Greg
nearly died while on a mountain climbing expedition, and he had to overcome hundreds of
obstacles in his mission to keep his promise and build
schools.

Potential exists in unlikely places - Time after
time, children who had literally nothing proved to be apt students and only needed the
opportunity to demonstrate their ability to learn.

Human
nature is consistent - So many of the people Mortenson encountered are the same in every
country and in every walk of life.

One person can be a
powerful agent of change - An average American man made a positive international
impact.

Respect for the traditions of other cultures - The
title, especially, pays homage to this theme.

These sound
rather trite, but they are the most obvious themes one will observe while reading this
true story. Any truth which strikes a chord in you can be considered a theme, as
well.