The late Charlie Munger spent decades studying the lives of history’s most effective thinkers. Among them, Benjamin Franklin stood above nearly everyone else.
Munger didn’t just admire Franklin from a distance. He structured his own life around Franklin’s principles, from how he read to how he managed money to how he argued an idea. Five of those lessons stand out as the ones Munger believed every man should internalize.
1. Master the Art of Lifelong Learning
“I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up, and boy does that help, particularly when you have a long run ahead of you.” — Charlie Munger.
Franklin began his career as a printer’s apprentice with no formal education. By the end of his life, he was one of the most accomplished scientists and diplomats in the Western world.
He got there the same way Munger described: treating every day as a chance to know slightly more than he did the day before. Munger pointed to this pattern as the single most reliable predictor of long-term success, and he lived it himself.
Munger backed this up directly. “In my whole life, I have known no wise people over a broad subject matter area who didn’t read all the time,” he said. “None, zero.”
Franklin’s approach was never passive. He kept a list of virtues to improve, taught himself French, started a lending library, and studied everything from electricity to economics with equal intensity. What changed was the subject. The method never did.
2. Aim to Live Usefully, Not Just Die Rich
“The years roll around, and the last one will come. When it does, I would rather have it said ‘he lived usefully’ than ‘he died rich.'” — Charlie Munger, quoting Franklin to describe his own philosophy.
Franklin retired from business in his early 40s, already wealthy enough to stop working. He didn’t stop. He redirected everything toward public service, scientific work, and the founding of institutions that still exist today.
Munger saw this as a clear model for what a life well-built actually looks like. Accumulating wealth isn’t the endpoint. It’s what you do with the freedom that wealth provides that defines your legacy.
Warren Buffett captured this in the foreword of Poor Charlie’s Almanack, writing that what Franklin recommended, Munger demanded of himself. The standard Munger held wasn’t comfort. It was a contribution.
For men building careers and financial foundations, this lesson reframes the whole goal. The question isn’t how much you can accumulate. It’s whether the life you’re building will mean something when it’s over.
3. Practice Intellectual Humility
“Rapid destruction of your ideas when the time is right is one of the most valuable qualities you can acquire. You must force yourself to consider arguments on the other side.” — Charlie Munger.
Franklin made a deliberate choice early in life to stop arguing in absolutes. He dropped words like “certainly” and “undoubtedly” from his speech and replaced them with softer language that invited real dialogue instead of shutting it down.
The effect was that people listened to him. He persuaded more people precisely because he appeared less attached to being right.
Munger extended this into his own thinking. He believed that the willingness to abandon your best ideas when the facts call for it separated rigorous thinkers from people trapped by ideology. Most men defend positions long after the evidence has moved on.
“It’s kind of fun to sit there and outthink people who are way smarter than you are because you’ve trained yourself to be more objective and more multidisciplinary,” Munger said. That objectivity starts with accepting you might be wrong today about something you were certain of yesterday.
4. Understand the Danger of Debt and Overspending
“Once you get into debt, it’s h*ll to get out. Don’t let credit card debt carry over. You can’t get ahead paying eighteen percent.” — Charlie Munger.
Franklin wrote about financial independence throughout his life, and his view on debt was plain: money owed to someone else is freedom surrendered. Every dollar you put toward servicing a debt is a dollar you can’t use to build anything.
Munger framed debt the same way, not just as a financial risk but as a trap that narrows your thinking. Debt forces defensive decisions. You make choices based on what you own, not on what you want to build.
He also warned against the kind of envy that drives most overspending. Watching someone else get rich faster and trying to match it is, as Munger put it, one of the few sins that offers no pleasure at all. There is real pain in that comparison and no upside at any point along the way.
Franklin’s model was practical: earn more than you spend, avoid borrowing for things that won’t grow in value, and keep your options open at all times. Munger lived this. The financial independence he built gave him the ability to say no to anything that didn’t meet his standards, and that is its own form of wealth.
5. Use Inversion to Solve Complex Problems
“Invert, always invert. Turn a situation or problem upside down. Look at it backwards.” — Charlie Munger.
Franklin didn’t only pursue virtue. He cataloged the specific behaviors that destroyed the men around him and systematically cut them out. Heavy drinking, untrustworthiness, bad company, careless spending: all of them made his list of things to eliminate rather than moderate.
Munger formalized this as what he called “inversion.” Instead of asking how to succeed, you ask what guarantees failure, then do the opposite. The answer tends to be clearer and more actionable than any forward-looking strategy you can construct.
“I sought good judgment mostly by collecting instances of bad judgment, then pondering ways to avoid such outcomes,” Munger said. “You can gain wisdom by studying stupidity and doing your best to avoid it.”
The power here is that it removes ego from the equation entirely. You’re not trying to prove how smart you are. You’re mapping out the patterns that reliably produce ruin and building a life that stays well clear of them. Franklin did this instinctively. Munger turned it into a discipline.
Conclusion
Franklin lived more than two centuries ago, but Munger spent a lifetime arguing that his framework still holds. Learn constantly, live usefully, stay humble, stay out of debt, and think backward from failure.
None of these requires any special talent. They require the discipline to apply them consistently over a long period without losing interest or making excuses. That, far more than luck or raw intelligence, is what both men believed separated those who built something lasting from those who passed through.