A woman whose pioneering work in the 1970s still makes front-page news, Donella Meadows was a scientist, author, teacher, and farmer widely considered ahead of her time. She was one of the world's foremost systems analysts and lead author of the influential "Limits to Growth"--the 1972 book on global trends in population, economics, and the environment that was translated into 28 languages and became an international bestseller. That book launched a worldwide debate on the earth's capacity to withstand constant human development and expansion. Twenty years later, she and co-authors Dennis Mead...