Europeans began exploring, expanding trade, and conquering other lands for several reasons in the 15th-16th centuries. Technological advancements in ship design and navigation, as well as training in seafaring, allowed explorers like the Portuguese and Columbus to reach new places. Europeans sought profit by establishing control over trade routes to Asia and finding gold and silver for wealth. Religious motives also drove expansion to spread Christianity and defeat Islamic forces. Competition between fragmented European states and the lack of a single political authority in Europe fueled further exploration and conquest for land, wealth, and national pride.