There is no reason why challenging themes and engaging stories have to be mutually exclusive - in fact, each can fuel the other.

To make a great movie is such a combination of different things that need to come into play to actually make a memorable film and not have a film to fall by the wayside, to have something live on during the years, and one of those elements is the commitment the actors have to their performance.

I am a fan of movies and there is something about watching film that is burned into celluloid for all time that is now a piece of history. You go watch, being a fan of classic films and my children and their children are going to be watching these movies.

However much I may like to talk about or be interested in a more philosophical or moral agenda, [film] is, ultimately, about narrative. And it's about telling stories that are engaging and dramatic.

What I was really overwhelmed with by Africa was its tremendous natural beauty; I got to go to some pretty amazing places. Every other weekend we got a day or two off and go on a safari or the natural wonders of Africa and if anyone gets the opportunity to go there, it's something you have to do in your lifetime.

And how deeply do I let business considerations affect [screenwriting] choices that might otherwise be more or less esthetic? . . . Do I choose the upbeat rather than the downer ending because I know it will score better at the preview? Can the idea be sold in a single sentence? Can it compete with space aliens and tornadoes and missions impossible?

I have nothing against diamonds, or rubies or emeralds or sapphires. I do object when their acquisition is complicit in the debasement of children or the destruction of a country.