The Roots of Heaven (1958)
The Roots of Heaven is a 1958 American adventure film in CinemaScope and DeLuxe Color made by 20th Century Fox, directed by John Huston and produced by Darryl F. Zanuck. The screenplay by Romain Gary and Patrick Leigh Fermor is based on Romain Gary's 1956 Prix Goncourt winning novel The Roots of Heaven (Les racines du ciel).
More at Wikipedia.