Watch YMovies. "H.O.P.E. What You Eat Matters" is a life-changing documentary uncovering and revealing the effects of our typical Western diet on our health, the environment and animals. Featuring Jane Goodall, T. Colin Campbell, Caldwell B. Esselstyn, Vandana Shiva, Melanie Joy and many other experts, the film has a clear message: By changing our eating habits, we can change the world!