Jan 2, 2019 · 27m · a16z
a16z Podcast | The Why Behind the Weird
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this episode of the a16z Podcast, economist Peter Leeson joins host Hannah to explore how seemingly absurd historical practices—from medieval animal trials and judicial ordeals to pirate constitutions—were actually rational systems driven by economic incentives and institutional needs.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. How this is scored →
The host as informed peer 2.4 Guest teaching 6.6 Guest disagreement 1.0 The host pushing back 1.8
speaking balance: gold is the host, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 21:33 Dismissing Polygraph Science
The guest bluntly rejects the scientific validity of polygraph tests, comparing them to astrology and calling lie detection claims complete nonsense.
Hardest push from the host ▶ 16:56 Testing Minor Crime IncentivesThe host directly challenges the guest's game-theory model by pointing out that suspects accused of minor crimes would rather confess falsely than risk having their arm boiled.
Biggest teaching moment ▶ 14:04 Debunking Boiling Water Injury RatesThe guest corrects the host's assumption that medieval ordeals left widespread injuries, presenting historical data showing that the vast majority were exonerated unharmed.
The host holds their own ▶ 10:44 Connecting Historical Tech ConstraintsThe host demonstrates strong historical analytical insight by observing that belief technology was required due to the absence of physical media like the printing press, which the guest enthusiastically confirms.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | The host as informed peer | Guest teaching | Guest disagreement | The host pushing back | Why |
|---|---|---|---|---|---|---|
| The Criminal Prosecution of Insects and Rodents | 1 | 7 | 1 | 1 | The guest explains historical legal proceedings brought against rodents and insects, describing appointed legal defense counsel and court continuances. The host prompts with enthusiastic questions, acting primarily as an astonished listener. | |
| Economic Incentives Behind Animal Trials and Belief as Technology | 4 | 7 | 1 | 2 | The guest details how medieval church authorities used vermin trials to compel tithe payment and demonstrate divine authority. The host actively synthesizes the economic principles, noting the absence of other physical technologies like the printing press. | |
| Medieval Judicial Ordeals and Trial by Boiling Water | 3 | 7 | 1 | 3 | The guest presents game-theoretic economic analysis explaining why medieval boiling water ordeals worked via self-selection and priestly manipulation. The host tests the logic by asking about minor crimes and priest self-deception. | |
| Witch Trials vs. Ordeals and Polygraphs as Modern Superstitions | 2 | 6 | 2 | 2 | The guest contrasts witch trials with fact-finding ordeals and passionately dismisses polygraphs as modern scientific superstitions. The host guides the discussion on how law enforcement utilizes polygraphs performatively. | |
| Pirate Constitutions and Democratic Governance | 2 | 6 | 0 | 1 | The guest explains how 18th-century pirates instituted consensual constitutional governance and injury compensation schemes. The host asks clarifying questions about enforcement mechanisms before concluding the interview. |
Statements from this episode (11)
Seemingly Irrational Historical Rituals Are Actually Rational Economic Behaviors
“People engage in all kinds of stuff that seems batshit crazy, but if you examine it through the lens of economics, if you just think about it in terms of basic constraints, you know, the limitations that people confront given their environments and the incenti…”
Economist Peter Leeson Documented Hundreds of Renaissance Insect and Rodent Trials
“I documented several hundred at least, and the trials often lasted long. They could, they certainly would last weeks. They could last many months”
Renaissance Courts Granted Insects and Rodents the Same Legal Rights as Humans
“They were prosecuted just like they were people. So they had all of the rights that would have attached to a person who had been accused of stealing somebody, somebody's crops, for example.”
Historical Superstitious Beliefs Functioned as Substitute Technologies for Social Governance
“You can kind of think about, in part, beliefs as a substitute technology for the sort of physical technologies that we take for granted in the modern world, many of which, as you point out, historically didn't exist. So naturally, they relied more on beliefs a…”
Most Defendants in Medieval Boiling Water Trials Were Actually Exonerated
“If you look at the historical evidence, it turns out the overwhelming majority of people who supposedly plunged their arms into boiling water were in fact exonerated.”
Medieval Priest Manuals Instructed Clergy to Secretly Manipulate Ordeal Water Temperatures
“Instruction manuals that priests of this era had for conducting ordeals, what you'll find is a whole bunch of fishy business where they essentially tell you to do things like, you know, you'll boil the water in private so that nobody can see, which means you m…”
Medieval Ordeals Sought Facts While Witch Trials Extorted Forced Confessions
“Ordeals are about finding fact when you don't know. They're about doing the same thing that contemporary legal systems do. But witch trials were about basically extorting confessions from people that you wanted to hear.”
Economist Peter Leeson Calls Polygraph Tests Scientifically Invalid Horseshit Like Astrology
“Totally horseshit. Like astrology, there are people who believe that polygraph tests are actually capable of physiologically measuring whether or not someone is lying or telling the truth, but the scientific community overwhelmingly and correctly rejects them.”
Polygraphs Work by Manipulating Incentives Through Shared Belief, Not Biological Measurement
“You can't physiologically measure whether or not someone is lying or telling the truth. But the thing is, as long as people believe that they're real, then just like ordeals, they have the power to affect our incentives.”
Early Caribbean Pirates Governed Their Ships Using Constitutional Democracy
“Pirates used a form of early constitutional democracy in order to govern their ships.”
18th-Century Pirate Constitutions Included Workman's Compensation for Limbs Lost in Battle
“Another key thing was piratical social insurance, a kind of workman's comp system. You know, if you lost your left arm in battle with a potential prize, you would receive out of the crew's common booty that he'd seized, compensation of a certain number of piec…”