[The field of personal finance has been enriched by the humanities for many years, with sociologists such as Thomas Stanley writing about The Millionaire Next Door. I find it very fortunate that I can now read the works of a history professor who has read hundreds of historical works on how to get rich in America and has personally undergone the journey to become a millionaire himself.
This is a worthy book for anyone who is serious bout personal finance.]
The promise of passive income has become a cornerstone of modern personal finance advice. Build a portfolio, collect dividends, and watch your wealth grow while you sleep—it sounds almost too good to be true. And according to Joseph Moore's How to Get Rich in American History, it might be exactly that.
Moore presents a compelling counterargument to the passive income narrative: most people who earn passive income spend it. And when you're spending your returns rather than reinvesting them, you forfeit the exponential growth that makes compound interest so powerful. The math is simple. If your dividend portfolio returns 4% annually but you withdraw that 4% to live on, your principal never grows. Meanwhile, conventional wisdom suggests your wealth should multiply year after year. It's a sobering critique that deserves serious consideration.
The Case Against Passive Income
Moore's argument cuts to the heart of a fundamental human truth: people have expenses. A retiree living off dividend income needs that money to pay the mortgage, buy groceries, and maintain their lifestyle. A young investor building toward financial independence might feel entitled to enjoy some of the fruits of their labour. In both cases, the passive income gets consumed, and the portfolio stagnates.
This matters because the entire pitch of passive income rests on compounding. If you're not reinvesting your returns, you're breaking the only engine that makes passive income wealth-building. It's the difference between a portfolio that grows from $500,000 to $1.3 million over 20 years (with reinvestment at 6% returns) and one that stays at $500,000 while you spend the annual $30,000 it generates. The narrative we're sold—retire early and live off your dividends—assumes you can live indefinitely on a fixed dollar amount, even as inflation erodes its purchasing power.
Moore's historical perspective offers valuable lessons about why this matters. Throughout American financial history, the wealthiest individuals weren't those who lived off passive returns; they were those who reinvested them relentlessly.
But There's More to the Story: The Psychology of Motivation
Yet Moore's thesis, while thought-provoking, doesn't tell the whole story. Many investors don't fall into the trap of spending 100% of their passive income. A real estate investor might reinvest a portion of rental income back into their properties. A dividend investor building wealth might live on 70% of their annual returns while letting 30% compound. A semi-retired person might need passive income to cover basic living expenses but continues earning a modest income from work, allowing them to reinvest the surplus.
But the more important gap in Moore's analysis isn't mathematical but psychological. I've spent years studying investor behaviour, and what I've learned is this: motivations matter in personal finance. In fact, I'd argue that financial success is as much a sociological phenomenon as it is a mathematical one.
Here's what I mean: the pure math says that spending your passive income is inefficient. But psychology says something different. The knowledge that money is flowing into your account every quarter—regardless of what you do—is profoundly motivating. It reinforces the investor's identity, validates their past decisions, and creates positive momentum to keep building. For many people, this motivation is the only thing that prevents them from abandoning their investment discipline when markets dip or life gets complicated.
Consider three psychological traps that derail novice investors:
- Dopamine-seeking — The impulse to chase exciting returns, leading to speculation and emotional trading.
- Recency bias — Overweighting recent good performance while underestimating risk in up markets.
- Benchmark blindness — Focusing on absolute returns while ignoring how your portfolio behaves during downturns.
A passive income stream combats all three. The regular arrival of dividends provides consistent positive reinforcement without requiring you to check stock prices or chase hot tips. It gives you something to show for your discipline. This isn't captured in a spreadsheet, yet it's the difference between an investor who holds for 30 years and one who panics and sells after the first correction.
In my view, passive income isn't primarily a wealth-building mechanism—it's a structural solution to behavioural discipline. The mechanism works because it solves a motivation problem, not just a math problem. Without that quarterly reminder that "you made the right choice," many investors would never build substantial wealth in the first place, regardless of the mathematics involved.
Why History Matters to Your Finances
Reading How to Get Rich in American History does something that most personal finance books don't: it grounds financial decision-making in real history. It's easy to accept the passive income narrative when you're only looking at current market conditions and recent case studies. But when you examine how wealth has actually been built across centuries of American economic life, you see patterns that aren't obvious in personal finance blogs.
I've spent years examining the historical record of investment, and one insight stands out: properties of an ideal investment don't change, but the context around them does. What made an ideal investment in 1800 shares has a certain DNA with what makes an ideal investment today. Yet the specific mechanisms—tax treatment, available asset classes, interest rate regimes, regulatory frameworks—shift dramatically.
Understanding this teaches you that financial advice doesn't exist in a vacuum. Tax policies change. Interest rates fluctuate. Economic structures transform. The strategies that worked brilliantly in one era might be obsolete in another. And the promises made to you by investment marketers—whether they're promising passive income or anything else—should be viewed with the healthy scepticism that comes from knowing how many "sure things" have failed throughout history.
When Moore examines American wealth-building across centuries, he's not just telling you what worked—he's showing you the difference between enduring principles and temporary conditions. For instance, dividend investing dominated wealth-building in the 20th century partly because of tax policy and the availability of traded shares, not just because dividends are intrinsically powerful. Yet the discipline of reinvestment—the core principle beneath Moore's critique—has always been central to building lasting wealth.
A sense of financial history also helps you separate timeless principles from fleeting trends. Spending less than you earn? That was true in 1850, and it's true in 2026. Letting your investments compound over decades? Still powerful. Seeking investments with predictable cash flows? Always valuable. But the specific mechanics of how you invest and what you can reasonably expect from that investment deserve scrutiny rooted in how things have actually worked out across different periods. History gives you that critical lens.
The Hidden Success Factor: Deliberate Architecture
The real lesson from both Moore's critique and the psychological research is this: passive income only works if you've designed your life around reinvestment, not dependence.
I call this "salary truncation"—the practice of fixing your lifestyle expenses and treating all passive income above that fixed level as capital to be reinvested. It's not about willpower or self-denial. It's about structural design. When you set your expenses at 70% of active income and 50% of passive income, you're not relying on motivation to do the right thing. You're making the right thing, the path of least resistance.
Moore's critique is mathematically correct: if you spend all your passive income, your portfolio won't grow. But his framework misses something crucial: people who successfully built wealth across history did two things simultaneously. First, they understood the mechanics of compound growth. Second, and more importantly, they created structures that made reinvestment automatic rather than aspirational.
The Synthesis: Why Moore Matters
What I've come to believe is that passive income is neither overrated nor underrated—it's simply misunderstood. It's a powerful tool for those who use it deliberately and thoughtfully. It's a trap for those who see it as a solution to overspending. And it's a structural enabler of financial discipline for those who understand that motivation matters as much as mathematics.
Moore's How to Get Rich in American History is valuable not because it provides the final answer, but because it asks the right questions and grounds them in evidence across centuries. He shows us that the wealthy didn't get wealthy by living off passive income, but they built it. This historical perspective cuts through the marketing noise and forces you to ask: What am I actually trying to do? Build wealth, or live off existing wealth? The answer matters because the structures you need are completely different.
If you're building a dividend portfolio, if you're planning to live off passive income, or if you're simply trying to understand how wealth actually gets built in America, this book deserves a careful read. The insight you'll gain isn't just about passive income. It's about the intersection of history, psychology, and deliberate design—and recognising that the best financial decisions are the ones you've actually thought through, rather than the ones you've been sold.
