In the summer of 1929, John Raskob's article told millions of Americans that wealth was now a matter of arithmetic and patience — and given what they could see, they had every reason to believe him.
So before anyone takes apart how this all collapsed, it's worth sitting inside the optimism — because the optimism wasn't stupid. It was built on something real. The 1920s delivered one of the most dazzling bursts of growth in the history of the United States, and you can't understand why the fall was so catastrophic until you feel how high the ground was that people were standing on.
Start with the thing that changed the texture of daily life: the automobile. At the start of the decade, cars were still something of a luxury. By the end, they were everywhere. Henry Ford's assembly line had turned the car from a handmade object into a mass-produced one, and the price collapsed accordingly. A Model T that cost hundreds of dollars became affordable to a working family, and Americans bought them by the millions. By the late 1920s, there was roughly one car for every five people in the country — a level of ownership no other nation came close to. Think about what that does to a society. New roads. Gas stations. Motels. Suburbs. Whole industries sprouting up around a single machine.
And the car was just the most visible piece. The deeper revolution was electricity. In 1920, most American homes didn't have it. By 1929, the majority of urban homes did — and with the wiring came an entire arsenal of new things to plug in. Refrigerators, washing machines, vacuum cleaners, toasters. And the radio. This is the decade radio went from a hobbyist's gadget to a fixture in the living room. By the end of the twenties, millions of households had one, and for the first time in human history a single voice could reach an entire nation at once. A family in Kansas and a family in New Jersey could hear the same broadcast on the same night. That had simply never been possible before.
Here's the engine underneath all of it — and this is the part that mattered most to economists at the time. Mass production. The same logic Ford applied to cars spread across American manufacturing. Standardize the parts. Break the work into simple repeated steps. Run the line faster. The result was a staggering jump in productivity — the amount a single worker could produce in an hour. Output per worker in manufacturing rose dramatically across the decade. Factories were making more, faster, and cheaper than anyone had thought possible. To the people watching, this didn't look like a temporary boom. It looked like a permanent change in the machinery of the economy itself.
And that's exactly what they started to call it. The "New Era." It's a phrase that shows up again and again in the writing of the late 1920s, and it carried a specific and intoxicating claim: that the old rules no longer applied. The old economy had moved in cycles — boom, then bust, then boom again, a kind of weather that everyone simply endured. The New Era thinkers argued that those cycles had been tamed. Better management, better technology, a smarter banking system, the steady hand of the new Federal Reserve — all of it, they believed, had smoothed the road. Prosperity, in this telling, wasn't a phase. It was the new baseline.
You can hear this confidence at the very top of American intellectual and political life, which is what makes it so striking in hindsight. In 1929, a committee of distinguished economists, working under the future president Herbert Hoover, produced a massive survey of the economy called "Recent Economic Changes." Their tone was sober, expert, measured — and deeply optimistic. They saw an economy that had learned to keep producing, keep consuming, keep growing, in what looked like a stable, self-sustaining loop. These were not gamblers. These were the most careful minds in the country, and they looked at the data and saw a machine that ran beautifully.
The most famous expression of all came from Irving Fisher, who was probably the most respected economist in America at the time — a Yale professor, a brilliant theorist, the man who'd done foundational work on how money and prices behave. In October of 1929, Fisher declared that stock prices had reached what he called a permanently high plateau. It is one of the most quoted lines in the history of economics, and usually it's quoted to make him look foolish. But pause on why a man that smart said it. Fisher wasn't being reckless. He was looking at the same New Era logic everyone else saw — rising productivity, rising profits, a transformed economy — and concluding, reasonably, that stock prices reflected real and lasting value. He had a fortune of his own riding on that belief. He lost most of it within months. The lesson there isn't that Fisher was a fool. It's that the smartest available reasoning, applied to the visible facts, pointed straight at the cliff.
Which brings us to the stock market itself, because by the late twenties the market had become the great mirror of national confidence. As corporate profits climbed through the decade — and they did climb, this was real — stock prices climbed with them. But then prices began climbing faster than profits, faster than anything underneath them could justify. The Dow Jones Industrial Average roughly tripled in the space of a few years in the back half of the decade. And rising prices pulled in more buyers, whose buying pushed prices higher still, which pulled in more buyers. The market had become a feedback loop, and the feeling it generated fed back into the whole country. People saw their stocks rise and felt rich, felt validated, felt certain that the New Era was real because here was the proof, ticking up every single day.
Now, stay with this for one step, because here's where the whole course quietly turns. Everything described so far is true. The cars were real. The electrification was real. The productivity gains were real, and they were enormous. The corporate profits were real. This was not a mirage or a con. The growth of the 1920s was one of the most genuine economic transformations any country had ever experienced.
And yet. Every single one of those strengths had a shadow side that was invisible from the top, and the shadow was the same size as the strength. The car boom was real — but a huge share of those cars were bought on installment credit, on debt that families would have to keep paying even if their income vanished. The soaring productivity was real — but workers' wages weren't keeping pace with what they were producing, which meant the gains were piling up at the top while the people who actually had to buy all those cars and radios were stretched thin. The rising stock market was real — but more and more of it was being bought with borrowed money, leverage stacked on leverage. The confident, stable banking system was real on paper — but it was made up of thousands of small, fragile banks, any one of which could topple the others.
This is the central puzzle the whole course is built to solve, so it's worth saying plainly. Think of the 1920s economy as a brilliant, powerful car going faster than any car had ever gone — with no brakes anyone had thought to check. The speed was real. The engineering was real. The danger was inside the very same machine. The conventional story, the one most people half-remember, says the stock market crashed and that crash caused the Depression. That story isn't wrong so much as it's looking at the wrong moment. The crash was the trigger. The gun had been loaded years earlier, in exactly these boom years, by exactly the things everyone was celebrating.
So if someone stopped you right here and asked what made the Roaring Twenties dangerous — what would you say? … Not weakness. Strength. An economy can be genuinely, dazzlingly healthy on the surface and structurally fragile underneath at the very same moment, and the 1920s is the clearest case of it in all of history.
That's the lens this course is going to hand you, piece by piece. And the first hidden vulnerability sits right inside that car in the driveway — the one the family was still paying for, one monthly installment at a time, on a quietly radical idea that would have shamed their own parents: buy now, pay later.