This volume presents the first full English translation of four key texts from the dispute between Juan Ginés de Sepúlveda and Bartolomé de las Casas regarding the justice of Spain's invasion of the Americas, culminating in their famous debate in Valladolid in 1550-51. An impassioned defence of the invasion, Sepúlveda's Democrates secundus (composed around 1544) amplified the controversy within Spain about the justice of its activities in the Americas. When Las Casas schemed to block publication of Sepúlveda's manuscript, Sepúlveda wrote an Apologia (1550) in its defence. Tensions were so high that Emperor Charles V called a temporary halt to undertakings in the Americas and convoked a meeting of theologians and jurists in Valladolid to address the matter. Here, Sepúlveda and Las Casas debated bitterly. Las Casas subsequently printed a composite record of the Valladolid deliberations (Aquí se contiene una disputa o controversia, 1552). Sepúlveda retaliated by penning a furious