Jane Goodall may be the world's most famous primatologist -- 50 years ago, she became the first to prove that nonhuman animals make tools -- but lately she's been spending more time focusing on ... plants. Her newest book, Seeds of Hope: Wisdom and Wonder From the World of Plants, cowritten with Gayle Hudson, chronicles her lifelong love of all things leafy. Why the newer focus on plants? It was as though the plants ... said, Look, Jane, you've spent all your life doing stuff for animals. It's our turn now." So it ended up being this incredibly inclusive book, which led me into very dark areas of human history, into the plantations and the slave trade, all the horrors of modern agriculture with its chemical pesticides and fertilizers, and then ... genetically modified plants. That was the most chilling of all: the huge conspiracy by the big companies who do genetic modification to keep the public from knowing the truth, to subvert the course of justice. What do you tell people who aren't convinced about buying organic? I say that if they really investigated the chemicals that are in nonorganic foods, they wouldn't want to eat them. And they say, "Oh, but we've been eating all this chemical and GMO food for ages and it doesn't hardly hurt us." But look at the rise of autism and attention deficit disorders among children since the end of World War II, when all these agricultural chemicals began. There are all kinds of diseases which nobody really knows why they're increasing. If you look at the chemicals that are in the plants, you don't want to have them in your body.