Discovery and Exploration Just a few short centuries after the country's birth, Portugal became the world's foremost naval power. Portuguese ships sailed all across the world, discovered new routes and started colonies. They influenced many countries worldwide during the height of their empire, but none like their colonies in West Africa. They brought both good and bad to West Africa, including their culture, Christianity, agriculture, and slavery. European mariners were the agents of the encounters among the many peoples of Africa. To understand why the trans-oceanic voyages took place one must first understand Europe's economic growth, one must understand the rise of bureaucratic states, the pace of technological innovation, intellectual and religious turmoil and the continuing crusading tradition of the late medieval period. European exploration, colonization and conquest was set in motion by the breakup of the Mongol empire and the growth of the Ottoman Empire which had blocked Europe's overland
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