Explorer, diving pioneer, filmmaker, inventor, and activist, Jacques Cousteau was blessed from his childhood with boundless curiosity about the natural world. As the leader of fascinating, often dangerous expeditions all over the planet, he discovered firsthand the complexity and beauty of life on earth and undersea--and watched the toll taken by human activity in the twentieth century. In this magnificent last book, finally available for the first time in the United States, Cousteau describes his deeply informed philosophy about protecting our world for future generations.