Described as a “chief among chiefs” by the British, and by his arch-rival, William Henry Harrison, as “one of those uncommon geniuses which spring up occasionally to produce revolutions and overturn the established order of things,” Tecumseh impressed all who knew him. Lauded for his oratory, military and diplomatic skills, and, ultimately, his humanity, Tecumseh presided over the greatest Indian resistance movement that had ever been assembled in the eastern half of North America. His genius lay in his ability to fully articulate religious, racial, and cultural ideals borne out of his people’s existence on fault lines between competing empires and Indian confederacies. Known as “southerners” by their Algonquian relatives, the Shawnees had a history of migrating between worlds. Tecumseh, and his brother, Tenskwatawa, converted this inheritance into a widespread social movement in the first decade and a half of the 19th-century, when more than a thousand warriors, from many different tribes, heeded their call to halt American expansion along the border of what is now Ohio and Indiana. Tecumseh articulated a vision of intertribal, pan-Indian unity based on revitalization and reform, and his ambitions very nearly rewrote early American history.