information:highlighting, stylistic:style_transfer, quality:corruption, linguistic:paraphrasing
Background

Under the Mongol Empire 's hegemony over Asia and the Pax Mongolica, Europeans had long enjoyed a safe land passage on the Silk Road to India, parts of East Asia, including China and Maritime Southeast Asia, which were sources of valuable goods. With the fall of Constantinople to the Ottoman Empire in 1453, the Silk Road was closed to Christian traders.

In 1474, the Florentine astronomer Paolo dal Pozzo Toscanelli suggested to King Afonso V of Portugal that sailing west across the Atlantic would be a quicker way to reach the Maluku (Spice) Islands, China, Japan and India than the route around Africa, but Afonso rejected his proposal. In the 1480s, Columbus and his brother proposed a plan to reach the East Indies by sailing west. Columbus supposedly wrote to Toscanelli in 1481 and received encouragement, along with a copy of a map the astronomer had sent Afonso implying that a westward route to Asia was possible. Columbus's plans were complicated by Bartolomeu Dias 's rounding of the Cape of Good Hope in 1488, which suggested the Cape Route around Africa to Asia.

Columbus had to wait until 1492 for King Ferdinand and Queen Isabella of Spain to support his voyage across the Atlantic to find gold, spices, a safer route to the East, and converts to Christianity.

Carol Delaney and other commentators have argued that Columbus was a Christian millennialist and apocalypticist and that these beliefs motivated his quest for Asia in a variety of ways. Columbus often wrote about seeking gold in the log books of his voyages and writes about acquiring it "in such quantity that the sovereigns... will undertake and prepare to go conquer the Holy Sepulcher " in a fulfillment of Biblical prophecy. Columbus often wrote about converting all races to Christianity. Abbas Hamandi argues that Columbus was motivated by the hope of " Jerusalem from Muslim hands" by "using the resources of newly discovered lands".