I love stories like this. Nana Yacuba was never mad but a wise man who listened to the voices of his ancestors and honored the earth. I have not seen the movie in its entirety but I'm sure it is inspiring.
The Man Who Stopped the Desert - trailer 1 Narrated by Hugh Quarshie - YouTube (http://www.youtube.com/watch?v=Dzah_5y65AU)
This really looks inspiring for real! I nominate it for our movie night list!