Osman, the founder of the Ottoman Empire, had a dream in which a tree sprouted from his navel. As the tree grew, its shade covered the earth; as Osman’s empire grew, it, too, covered the earth. This is the most widely accepted foundation myth of the longest-lasting empire in the history of Islam, and offers a telling clue to its unique legacy. Underlying every aspect of the Ottoman Empire’s epic history—from its founding around 1300 to its end in the twentieth century—is its successful management of natural resources. Under Osman’s Tree analyzes this rich environmental history to understand the most remarkable qualities of the Ottoman Empire—its longevity, politics, economy, and society.