Warren vs. Charlie: Every Known Disagreement

🧠 Core Philosophy

The partnership between Warren Buffett and Charlie Munger is widely regarded as the most successful in business history. However, its strength lay not in blind agreement, but in constructive intellectual friction. Munger famously remarked that he and Buffett did not agree on everything, but they had "never had an argument."

Their disagreements were philosophical debates on valuation, business quality, and risk. In most cases, Munger's role was to pull Buffett away from Ben Graham's "cigar-butt" investing toward buying Quality Compounders at fair prices, while Buffett acted as the final filter on capital allocation and valuation discipline.

📅 Chronological Evolution & Key Debate Nodes

1. Cigar Butts vs. Quality (See's Candies, 1972)

The most consequential disagreement occurred in 1972 during the negotiation to buy See's Candy. The seller wanted $40 million. Buffett, still operating under the strict Benjamin Graham value formula, refused to pay more than $30 million because the company's tangible book value was only about $8 million.

Munger intervened, arguing that See's had an unquantifiable brand moat—Economic Goodwill—and pricing power that made it worth the premium. Buffett eventually relented, buying it for $35 million. See's went on to generate over $2 billion in profits on only $40 million in capital, teaching Buffett the power of a brand moat.

"Charlie shoved me in the direction of buying better businesses at fair prices... It took a force of nature to push me. Charlie was that force." — Warren Buffett

2. Costco Wholesale (1997–2023)

Munger joined the board of Costco Wholesale Corporation in 1997 and fell in love with its low-cost membership business model. He repeatedly urged Buffett to buy Costco stock for Berkshire’s portfolio.

Buffett demurred, believing Costco's valuation (P/E ratio) was consistently too high relative to its margin of safety. While Buffett agreed that Costco was a magnificent business, he could not overcome his price discipline. Munger was so passionate about Costco that he kept his board seat and personally owned a massive stake in the company until his death.

"Costco is a damn miracle... I wish everything else in America worked as well as Costco does." — Charlie Munger, 2023

3. Airlines (2016–2020)

Buffett historically mocked the airline industry, writing in 1992 that if a far-sighted capitalist had been present at Kitty Hawk, he would have done investors a favor by shooting Orville Wright down. However, in 2016, Buffett changed his mind and invested billions in the "Big Four" US airlines (Delta, American, United, Southwest), believing consolidation had turned them into stable oligopolies.

Munger was highly skeptical of the purchase, pointing to the industry's history of labor disputes, high capital requirements, and lack of real pricing power. Buffett eventually admitted Munger was right, selling all airline stakes at a loss in April 2020 during the COVID-19 pandemic shutdown.

4. Chinese EV Pioneer: BYD Company (2008)

In 2008, Munger met Wang Chuanfu, the founder of Chinese battery and electric vehicle manufacturer BYD Company. Munger was astonished by Wang's engineering genius and urged Buffett to invest. Buffett was hesitant to invest in a capital-intensive automotive company in China, which lay outside his traditional circle of competence.

Munger persisted, famously telling Buffett: "We have to buy this. This guy is a combination of Thomas Edison and Jack Welch." Berkshire bought a 10% stake in BYD for $230 million. By 2021, that stake was worth over $8 billion, making it one of Berkshire’s most profitable venture-style investments.

🔗 Connections

• Entities: Warren Buffett, Charlie Munger, Costco Wholesale Corporation, BYD Company, See's Candy
• Concepts: Cigar Butts, Quality Compounders, Economic Goodwill, Capital Allocation
• Sources: 1989 Letter, 1997 Meeting, 2008 Meeting, 2009 Meeting, 2024 Letter