Si Sheppard – How did a few hundred Spanish soldiers topple two empires?

October 1, 2026

AI Summary

5 min read

The conquistadors who toppled the Aztec and Inca empires were not an organized army but a collection of ambitious, profit-seeking entrepreneurs. Hernán Cortés landed on the coast of Mexico in 1519 with a few hundred men, no mandate from his king, and no map of the interior. Within two and a half years, he controlled an empire of six million people. Ten years later, Francisco Pizarro repeated the feat in Peru with just 168 men against an Inca Empire of ten million, winning the opening battle at Cajamarca with zero Spanish casualties. These outcomes were not inevitable, but they were made possible by a specific combination of technological, biological, and political factors that the indigenous empires could not counter in the short time they had.

The real advantages: steel, horses, and psychological shock

The conquistadors' technological edge is often reduced to "guns, germs, and steel," but the reality is more specific. Guns were slow to reload and had limited battlefield impact once the initial shock wore off. The decisive advantages were steel and horses. Local weapons were made from wood, stone, and obsidian—razor-sharp but brittle. Against Spanish steel armor and helmets, they were largely ineffective, while the conquistadors' Toledo sword blades could be used as thrusting weapons to take down opponents who relied on slashing attacks.

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What you'll learn

1 Si Sheppard – How did a few hundred Spanish soldiers topple two empires?
2 Timestamped Outline
3 (00:00) **Introduction: The Puzzle of the Conquests** - Dwarkesh frames the central mystery: how a few hundred conquistadors subjugated empires of millions, winning battles outnumbered 100:1, often with zero casualties, while 99% of their own forces were natives.
4 (01:53) **Background: Europe's Atlantic Breakout** - Prince Henry the Navigator and Columbus set the stage for accidental empire.
5 (03:10) **Cortés Goes Rogue** - Hernán Cortés, a minor magistrate on Cuba, exceeds his warrant and launches an unauthorized conquest.
6 (04:11) **The Diplomatic Key: Cortés Finds Aztec Enemies** - Cortés immediately grasps that the Aztec Empire has resentful subject peoples.
7 (05:45) **The Technological Edge: Steel, Horses, and Mind Games** - The specific military advantages that made the conquistadors devastating in battle.

+ Full timestamped outline available in the app

Show Notes

New episode with military historian Si Sheppard.

The conquests of the Aztec and Inca empires might be the most shocking events in human history.

Hernan Cortés and some hundreds of Conquistadors landed on a new continent they knew basically nothing about, and within 2 and a half years, conquered the 6 million strong Aztec empire.

Then, a decade later, Francisco Pizarro did the same thing to an Incan Empire of some 10 million inhabitants.

In both cases, the Conquistadors consistently beat native armies while being literally 100x (or even in some cases 1000x) outnumbered - and in many cases, did so without taking a single casualty.

And they did this with 99% of their military forces being made up of the very natives they were trying to subjugate.

We often forget how wild human history is. People talk about AI takeover as if it would be some crazy, unprecedented sci-fi outcome. But this would not be the first time an alien force whose motives the defenders barely understand use more advanced technology and diplomatic cunning to outmaneuver and then take over a much larger and long established existing order.

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