Free Course

What is Money, Really?

A short course on where money came from, what makes it work, and why we still trust it.

15 lessons·1 hr 13 min total·Free, no signup

01·Lesson
5:00
The Barter Problem: Why Money Actually Exists
Before there was money, there was a problem. A short walkthrough of the 'double coincidence of wants' that made barter break down, the workarounds early societies tried (debt ledgers, multi-hop trades, forced exchange rates), and how money quietly emerged as the elegant solution — not by decree, but by shared agreement on what counts as valuable.
02·Lesson
5:00
Money: The Three Essential Functions Explained
Why is some money 'good' and other money broken? A short walkthrough of the three jobs every functioning currency has to do — medium of exchange, unit of account, and store of value — why all three are required, and how hyperinflation, gold, cowrie shells, and digital currencies all map onto the same framework.
03·Lesson
5:00
Gold, Salt, and Cattle as Money
Before there were coins, there were commodities — useful things that doubled as money. A short walkthrough of why salt, cattle, and gold became the world's first currencies, the five properties that decided which commodities won, and the built-in instability of money you could also eat, milk, or wear.
04·Lesson
5:00
Coins: How Stamps Made Money Trustworthy
Once communities agreed money was money, the next problem was proving it. A short walkthrough of how the first stamped coins replaced weighing-and-biting with institutional trust — collapsing transaction costs, enabling vast empires, and introducing a brand-new failure mode: debasement, the silent inflation that toppled currencies long before paper money existed.
05·Lesson
4:42
A Brief History of Paper Money
How did money break free from metal? A short walkthrough of paper money's accidental origin in medieval China — warehouse receipts that quietly became more useful than the gold inside the warehouse — the Yuan Dynasty hyperinflation that followed, Europe's 600-year-later adoption through private banks, the fractional reserve trick that multiplied money supply, and why digital money is just the same idea taken to its logical conclusion: trust in a promise, with no physical form required.
06·Lesson
6:02
Why We Left the Gold Standard
For most of the 20th century, money was tethered to gold — and then, in a single August evening in 1971, that tether was cut. A short walkthrough of how the gold standard actually worked, why a fixed gold price ($35 an ounce) became an economic straitjacket, what Bretton Woods tried to do, why Nixon ended gold convertibility, and why fiat money — backed by nothing but trust — turned out to be more flexible, more resilient, and the foundation of every modern economy.
07·Lesson
6:00
Why Fiat Money Works
If fiat money isn't backed by gold, silver, or anything you can actually touch — why does anyone accept it? A short walkthrough of the three foundations that hold modern currencies up: legal enforcement (legal tender laws), institutional control (central banks), and confidence (sustained public trust). Plus the role taxes play in creating baseline demand, why hyperinflation is the one failure mode that ends a fiat currency, and why the U.S. dollar — pure paper for half a century — became the most powerful currency in human history.
08·Lesson
3:12
Digital Money: The Journey of the Invisible Paycheck
Only 2% of the money in the world is physical — coins and bills. The other 98% is digital: numbers in databases, IOUs from your bank, balances that move between accounts without anyone ever printing a thing. A short walkthrough of what digital money actually is (a bank's promise to pay), how fractional reserve banking lets banks create new money by lending, why payment networks (cards, ACH, blockchain) make digital money usable, and the one failure mode that has haunted the system for centuries: the bank run.
09·Lesson
4:01
Money: The World's Oldest Memory
The textbook story says barter came first, then commodity money, then credit. The archaeological record tells a different story. A short walkthrough of how Mesopotamia, Egypt, and early China ran sophisticated debt-based economies thousands of years before coins existed — and why money, at its core, is information about who owes what to whom, not the physical token in your hand.
10·Lesson
4:54
Why We Can't Just Print More Money
If a government can print money, why doesn't it just print enough to pay off every debt and end every shortage? A short walkthrough of why scarcity is the load-bearing feature of every functioning currency, how all three jobs of money break the moment supply goes infinite, and why hyperinflations from Weimar to Zimbabwe to Venezuela all follow the same script — deficit, printing, inflation, confidence collapse, abandonment.
11·Lesson
4:42
Legal Tender vs Money
Governments declare what counts as legal tender. Markets decide what counts as money. Most of the time the two overlap so neatly we forget they're separate — and then a hyperinflation hits and the gap becomes the only thing that matters. A short walkthrough of why legal tender laws only force acceptance for debts, why governments can't legislate something into being money, and why functional currency requires both legal force and voluntary trust.
12·Lesson
5:10
Understanding Money Supply Categories
When economists say 'the money supply', they don't mean one number — they mean a stack of them. M0, M1, M2: each layer captures money at a different distance from immediate spending, and each behaves differently in a crisis. A short walkthrough of what these categories actually contain, why central banks can directly control some and only nudge others, and why M2 is the number inflation is measured against.
13·Lesson
4:11
How Fast Money Circulates
The same dollar can buy ten different things in a year — or sit in an account doing nothing. The difference is velocity, and it's the missing variable that explains why printing money sometimes causes inflation and sometimes doesn't. A short walkthrough of the equation MV = PQ, why a dollar changes hands four-to-ten times a year in healthy economies, why velocity crashes during recessions, and what the wild swings of 2020–2021 actually showed us.
14·Lesson
5:18
Why Authenticity Matters for Money
Counterfeiting isn't just theft. It's a slow-motion attack on the unit of account itself — every fake bill that circulates makes every real one worth a little less. A short walkthrough of why authenticity is non-negotiable for money to work, the historical episodes where counterfeiting collapsed entire currencies, the layered defenses on a modern banknote, and why digital money may finally make counterfeiting mathematically impossible.
15·Lesson
4:20
The Future of Money
Three monetary technologies are racing toward the same future at the same time: central bank digital currencies, stablecoins, and cryptocurrencies. Each one solves a different problem and creates a different set of trade-offs around control, privacy, and trust. A short walkthrough of what CBDCs actually do, why programmable money changes the rules of every economy that adopts it, and why the transition will take decades, not months.

The Barter Problem: Why Money Actually Exists

Money: The Three Essential Functions Explained

Gold, Salt, and Cattle as Money

Coins: How Stamps Made Money Trustworthy

A Brief History of Paper Money

Why We Left the Gold Standard

Why Fiat Money Works

Digital Money: The Journey of the Invisible Paycheck

Money: The World's Oldest Memory

Why We Can't Just Print More Money

Legal Tender vs Money

Understanding Money Supply Categories

How Fast Money Circulates

Why Authenticity Matters for Money

The Future of Money

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