David Lowenthal published a biography of Marsh in the 1950s, and but this 2000 one is so vastly revised and updated that he says it is "wholly superseded." George Perkins Marsh was a polymath, and to account for him, his biographer must be proficient in the same vast array of fields. Lowenthal fulfills this mission. He tells us about all Marsh's subjects with seamless ease: deforestation, soil erosion, and desertification; the history of the English language as well as Icelandic; marble quarrying, railroad competition, and Vermont fisheries; natural history and the Smithsonian Institution; international diplomacy, in Istanbul, Greece, and Italy; the topography of the Near East; and collecting both art and natural specimens. Further, he explains the content and significance of Marsh's pioneering 1864 book Man and Nature and makes the case for its importance today, even when the global environmental challenges of 2013 are far more perplexing than Marsh could ever have imagined. As if Lowenthal's mastery of his subject were not enough--his prose is quite simply gorgeous.