Traces the mass human migration across the North American continent. "In July 1845, John L. O'Sullivan wrote an editorial in the United States Magazine and Democratic Review in which he proclaimed that it was the nation's "Manifest Destiny ... to overspread the continent allotted by Providence for the free development of our yearly multiplying millions." With the support of President James K. Polk, Manifest Destiny became a rallying cry for the United...

Profiles explorers from classical times to the present, and examines the history of exploration in conjunction with writing, women, painting, legends, aviation, and archaeology.