European colonization reshaped the world from the 15th to 19th centuries. Nations like Spain, Portugal, Britain, and France established global empires, exploiting resources and labor in the Americas, Africa, and Asia. This era saw the Columbian Exchange, Atlantic slave trade, and rise of mercantilism. It profoundly impacted indigenous populations, global trade networks, and social structures, leaving a complex legacy that continues to influence modern geopolitics and economies.