1406
Ibn Khaldun Dies in Cairo
The Tunisian historian who invented sociology died as a Maliki judge in Mamluk Egypt, his Muqaddimah mostly unread. He had argued that civilizations rise and fall on asabiyyah, the tribal solidarity that softens in cities. Six centuries later, economists still quote him without knowing they are doing it. His cyclical theory of civilization anticipated modern theories of imperial rise and decline by half a millennium.
Ptolemy's Geography Translated into Latin
Jacopo d'Angelo completed a Latin translation of Claudius Ptolemy's second-century Geography in Florence, reintroducing coordinate-based mapping to Western scholars for the first time in a millennium. The text taught European cartographers to think of the earth as a measurable grid of latitude and longitude. Within a century, that same grid would be used to divide continents Europeans had not yet visited between rival colonial powers.
Florence Conquers Pisa
After a brutal starvation siege, the Arno republic swallowed its coastal rival and finally gained a seaport. Florentine galleys could now reach Alexandria without begging Genoese permission. The triumph funded a generation of Medici banking and, indirectly, the paintings that would define the next century. Pisa's population, decimated by siege, was further reduced by Florentine reprisals that scattered its merchants across Italy.
Portugal Secures Atlantic Islands
Portuguese settlers were establishing permanent colonies on the Azores and Madeira, experimenting with sugar cultivation and African slave labor in patterns that would be scaled up for Brazil and the Caribbean. The fifteenth-century Atlantic was becoming, quietly, a Portuguese lake. Madeira's sugar plantations, worked by enslaved laborers, served as the prototype for the economy that would devastate Brazil and the Caribbean.