When your leader is traveling in lands where he not only doesn’t know the history but even the language or geography, the temptation is overwhelming to urge caution upon him. But caution was not what led Magellan to greatness. Caution did not lead him to sail beyond the limits of the known world. Caution was not the byword of the country under whose flag he sailed--Spain, well launched toward its destiny as the great 16th-century empire.