Existing simultaneously with the image of Boone as a refugee from society was, paradoxically, the popular portrayal of him as civilization's trailblazer. Boone was celebrated as an agent of Manifest Destiny, a pathfinder who tamed the wilderness, paving the way for the extension of American civilization. In 1852, critic Henry Tuckerman dubbed Boone "the Columbus of the woods," comparing Boone's passage through the Cumberland Gap to Christopher Columbus's voyage to the New World. In popular mythology, Boone became the first to explore and settle Kentucky, opening the way for countless others to follow. In fact, other Americans had explored Kentucky before Boone, as debunkers in the 20th century often pointed out, but Boone came to symbolize them all, making him what historian Michael Lofaro called "the founding father of westward expansion."