The Florida Everglades are made up of nine different ecosystems supporting an astonishing variety of wildlife--panthers, manatees, snails, frogs, and a rainbow of bird species. But for years, the Everglades were threatened. They needed a voice to speak up for them. Marjory Stoneman Douglas became that voice. Her book A River of Grass helped the world see the irreplaceable beauty and value of the Everglades. Marjory's activism led to the creation of a national park and dedicated conservation efforts, and throughout her long life she inspired countless people to use their voices to make a difference.