Chapter 3: The Doctrine of Discovery: Justifying Conquest

How did European powers, and later the Anglophone world, justify the act of sailing to other continents and claiming ownership of them? The answer lies not just in superior military technology, but in a powerful set of legal and religious ideas that provided a moral and philosophical license for conquest. The most important of these was the “Doctrine of Discovery.”

This doctrine, which emerged from a series of papal bulls (decrees from the Pope) in the 15th century, established a shocking principle: Christian explorers who “discovered” lands inhabited by non-Christians had the right to claim those lands for their own sovereigns. The indigenous inhabitants were not considered to have true ownership of their ancestral homes. Their presence was an inconvenience, but not a legal barrier to colonial expansion.

At the heart of the Doctrine of Discovery was the concept of Terra Nullius, a Latin term meaning “nobody’s land.” This legal fiction declared that lands inhabited by indigenous peoples who did not have recognizable (to Europeans) systems of government, agriculture, or property ownership were effectively empty and available for the taking. It was a doctrine that saw millions of people and saw nothing.

This chapter will trace the history of this idea and show how it became the foundational legal and moral justification for the entire colonial project. We will explore:

• Its Origins: How the Catholic Church, in an effort to encourage the exploration and domination of non-Christian lands by Portugal and Spain, created a framework that would be adopted and adapted by Protestant England.
• Its Codification in Law: How the Doctrine of Discovery was absorbed into the legal systems of Anglophone nations, most notably in a landmark 1823 U.S. Supreme Court case, Johnson v. M’Intosh, which explicitly cited the doctrine to deny land rights to Native Americans.
• Its Consequences: How this single idea provided the intellectual and legal scaffolding for centuries of land theft, forced displacement, and genocide against indigenous peoples in North America, Australia, New Zealand, and beyond.

The Doctrine of Discovery is perhaps the ultimate example of how history is written by the victors. It is an act of intellectual violence that precedes the physical violence, a legal maneuver that declares the victims to be non-persons before the first shot is even fired. Understanding this doctrine is essential to understanding the very foundation of the modern Anglophone world.