Munger Investment Checklist Part 9: Change

Charlie Munger, Warren Buffett’s longtime partner, was well known for his sharp intellect and simple, straightforward wisdom on matters related to investing and life. He had the ability to break down complex ideas into practical lessons that could be applied to everyday situations. Munger’s timeless lesson was that lasting success isn’t built on sudden bursts of genius, but on steady, disciplined thinking that helps you steer clear of costly mistakes.

One of his greatest contributions is a “checklist” of mental models, enduring principles for clear and rational decision-making. This week, we explore the ninth principle - change - and why it’s essential to embrace it rather than resist it.

Munger on change

In his book Poor Charlie’s Almanack, Munger stated: “Live with change and accept unremovable complexity.” This principle captures the essence of adaptability — that change is the only constant, and we must be willing to evolve in an unpredictable world. Munger understood that markets, businesses, and human behavior are in constant flux.

Success, therefore, depends not on clinging to stability but on developing the mental flexibility to adjust.

• Recognise and adapt to the true nature of the world around you, don’t expect it to adapt to you: Munger tells it like it is: reality doesn’t bend to your wants and needs. Munger often reminded investors that reality doesn’t adjust to our wishes. The world runs on its own rules — driven by incentives, competition, and human behavior — not by what we hope will happen. Investors who ignore this basic truth will likely end up disappointed, but those who adapt can seize good opportunities.

Whether it’s a new technology that’s disrupting an established sector, or an economic shift changing the direction of the markets, Munger’s advice was simple: see the world as it truly is, not as you want it to be. That requires intellectual honesty, a willingness to change your views when the facts change, and the humility to stay flexible. In the long run, adaptability is what keeps investors ahead.

• Continually challenge and willingly amend your best-loved ideas: Munger was ruthless about questioning his own assumptions. “I never allow myself to have an opinion on anything that I don’t know the other side’s argument better than they do,” he once said. His approach to change wasn’t just about reacting to external forces, it was about evolving internally. He encouraged investors to treat ideas like tools. If an idea no longer works, discard it. If new evidence emerges, re-examine your position. The ability to say “I was wrong” is what keeps good investors from becoming obsolete.
• Recognise reality even when you don’t like it — especially when you don’t like it: Perhaps Munger’s toughest lesson is this: the truth can be uncomfortable. He believed that facing unpleasant realities — declining industries, poor decisions, market corrections — is the only way to make rational choices. Denial, on the other hand, compounds mistakes. This principle applies far beyond investing. In business, leadership, and life, the ability to confront hard facts head-on without emotion clouding judgment is invaluable. The faster you acknowledge what’s not working, the sooner you can change course and recover.

Why it’s important

Change is the only constant in markets and in life. Munger’s philosophy teaches that survival and success are based on adaptability, not rigidity. The world will continue to evolve — industries will transform, consumer behavior will shift, and new technologies will rewrite the rules. Those who thrive are the ones who stay curious, question their assumptions, and evolve with the times. The ability to evolve is not just an advantage; it’s what leads to lasting success.