It is evident that Amerigo Vespucci, the famous Florentine navigator, had at his disposal knowledge that no one had previously managed to possess. Knowledge that allowed him to affirm that the new lands, discovered by the genius of Christopher Columbus, were not Asia, as he had believed, but an entirely unknown world. That was the great news that Vespucci delivered to the world, the basis of his glory and the reason why a whole new continent would be baptized, exactly five hundred years ago, in his honor: America. Intrigued with such a fascinating character, the great Colombian historian and Americanist Germán Arciniegas, set out to study his life and times. This book, a synthesis of his results, offers us a new human profile of Vespucci, which differs both from the image transmitted by his detractors and from that created by his panegyrists, while shedding light on the time in which he lived and the reasons for its actual ignorance on the part of many traditional historians. This volume complements the title of the same author When America Completed the Earth, published by Villegas Editores, within the series "Historia", in small format.