Valladolid Debate (1550–1551): Las Casas versus Sepúlveda

The Valladolid debate (Spanish: Junta de Valladolid) of 1550–1551 was a formal disputation in Spain on the justice of conquering the Indigenous peoples of the Americas. Before a panel of theologians and royal councillors, the Dominican friar Bartolomé de las Casas and the humanist scholar Juan Ginés de Sepúlveda argued over whether war against Native Americans was lawful and whether they could be considered “natural slaves”. It is often seen as an early landmark in the debate on human rights.

Background

Within decades of 1492, Spanish conquest and colonisation had brought violence, forced labour and catastrophic population loss to the Caribbean and the mainland. Under the encomienda system, settlers received the labour and tribute of Indigenous communities in return for promising to protect and Christianise them, an arrangement that was widely abused.

Criticism began early. In 1511 the Dominican Antonio de Montesinos preached against Spanish cruelty on Hispaniola. Spanish jurists and theologians, notably Francisco de Vitoria at the University of Salamanca, questioned on what legal basis Spain could claim authority over American peoples. In 1537 Pope Paul III’s bull Sublimis Deus declared that Indigenous Americans were rational beings capable of receiving the faith and must not be enslaved.

The crown also acted. The New Laws of 1542 restricted the encomienda and forbade Indian slavery, though fierce resistance from settlers forced their partial repeal in 1545. The question of whether conquest itself was just remained open.

The two opponents

Bartolomé de las Casas (1484–1566) had arrived in the Caribbean in 1502 and held an encomienda himself before renouncing it in 1514. He became a Dominican friar, a tireless advocate for Indigenous peoples and, from 1544 to 1550, Bishop of Chiapa in southern Mexico. His campaigning had helped bring about the New Laws.

Juan Ginés de Sepúlveda (c. 1490–1573) was a leading Aristotelian scholar, translator of Aristotle’s Politics and royal chronicler to Charles V. In the mid-1540s he wrote a dialogue, Democrates secundus, defending the wars of conquest. Las Casas and others opposed it, and the universities of Salamanca and Alcalá declined to approve its publication.

Why the debate was called

The controversy over Sepúlveda’s book reached the highest levels of government. In 1550 Emperor Charles V, who was also King of Spain, took the unusual step of ordering a halt to new conquest expeditions in the Americas until a panel had decided how they could be conducted justly.

The Council of the Indies and the Council of Castile convened a board of about fourteen or fifteen judges, among them the theologians Domingo de Soto, Melchor Cano and Bartolomé Carranza, all Dominicans, alongside royal councillors and jurists. The meetings took place at the Colegio de San Gregorio in Valladolid, then a principal seat of the court.

The arguments

The first session opened in August 1550. Sepúlveda spoke first, summarising his case in an address of about three hours. He argued that war was just for four main reasons:

• The Indigenous peoples were, he claimed, by nature inferior and suited to be ruled by wiser peoples, following Aristotle’s theory of “natural slavery”.
• Their idolatry and practices such as human sacrifice and cannibalism were crimes against natural law that justified intervention.
• War was needed to rescue the innocent victims of sacrifice.
• Conquest would open the way for Christian preaching.

Las Casas replied by reading, over about five days, his long Latin Apologia. He argued that the peoples of the Americas had cities, laws, rulers and arts, and so were fully rational and could not be natural slaves. He insisted that their rulers held legitimate authority, that Spain had no right to punish crimes committed outside Christian jurisdiction, and that faith could be spread only by peaceful persuasion. On human sacrifice, he argued controversially that its practitioners acted in sincere, if mistaken, belief, and that a war would kill far more innocents than it saved.

Domingo de Soto prepared a summary of both positions for the judges. Sepúlveda wrote replies to Las Casas’s objections, and Las Casas answered them in turn. A second session met in April and May 1551.

Outcome

The judges did not issue a single collective verdict. Several submitted individual opinions over the following years, and at least one, Melchor Cano, apparently never did. Both sides claimed to have won.

In practice, the result leaned towards Las Casas. Sepúlveda’s Democrates secundus was not licensed for publication in Spain, and remained unpublished until the 19th century. Las Casas printed a series of tracts in Seville in 1552, including a summary of the dispute and his Brevísima relación de la destrucción de las Indias (A Short Account of the Destruction of the Indies).

For Las Casas, the debate was the climax of a long campaign. He resigned his bishopric in 1550 and spent his remaining years at court in Spain, writing and lobbying on behalf of Indigenous peoples until his death.

Conquests were not abandoned, however. Expeditions resumed, and the encomienda and other forms of forced labour continued for generations. Philip II’s Ordinances of 1573 on new discoveries and settlements notably replaced the word “conquest” with “pacification” and required that peaceful means be tried first, a change many historians link to the arguments aired at Valladolid.

Myths and facts

Myth: the debate was about whether Native Americans had souls. Neither side doubted it. Both accepted that Indigenous Americans were human and capable of salvation; the question was their legal and political status and the justice of war.

Myth: Las Casas was a consistent opponent of all slavery. In 1516 he had proposed that enslaved Africans replace Indigenous labourers in the colonies. Late in life he wrote that he deeply regretted this, recognising that the enslavement of Africans was just as unjust.

Fact: the debate had no formal winner. Its importance lies in the arguments it produced and in the fact that a ruling power publicly examined the morality of its own empire.

Legacy

The Valladolid debate is frequently cited in histories of international law, human rights and anthropology. Las Casas’s insistence that all peoples are rational and share a common humanity anticipated later arguments about universal rights, while Sepúlveda’s case became a reference point for the history of colonial and racial ideas.

Las Casas’s Short Account, translated into Dutch, French, English and other languages, was later used by Spain’s enemies as propaganda, contributing to the so-called “Black Legend” of Spanish cruelty. The Spanish conquest of the Aztec Empire and other campaigns remained central examples in these arguments.

Timeline

• 1511, December: Antonio de Montesinos preaches against Spanish abuses on Hispaniola.
• 1537: Pope Paul III issues Sublimis Deus.
• 1542, November: Charles V promulgates the New Laws.
• c. 1544–1545: Sepúlveda writes Democrates secundus.
• 1550, April: Charles V suspends new conquest expeditions pending a ruling.
• 1550, August–September: First session of the debate at Valladolid.
• 1551, April–May: Second session.
• 1552: Las Casas publishes his tracts in Seville, including the Short Account.
• 1566, July: Las Casas dies in Madrid.
• 1573, July: Philip II issues his Ordinances on discovery and settlement.

Why it matters

The Valladolid debate was one of the first times a European empire formally questioned the morality of its own conquests. Though it produced no verdict and did not end colonial violence, it set out arguments about human equality, the rights of peoples and the limits of state power that still echo in modern debates.