The document discusses the reasons for European exploration beginning in the 15th century. It summarizes the motivations and activities of the major exploring powers of Portugal, Spain, England, and France. Portugal's Prince Henry the Navigator established a school of navigation and sponsored voyages down the coast of Africa. Spain sent Columbus to find a route to Asia, leading to Spanish conquests in the Americas. England and France sought riches, gold, silver and furs, leading to the establishment of global empires, with England eventually controlling a quarter of the world's population and land area.