The Power Law

The Verdict

Mallaby’s real contribution here is making the math legible: once you understand that a VC fund’s entire return can come down to one Google-sized bet, half the industry’s behavior stops looking irrational and starts looking like the only strategy that makes sense at that scale. That’s worth the price of admission by itself.

The WeWork chapter is where the book earns its skepticism. SoftBank’s approach – write checks big enough to force a deal, then push the founder toward maximum ambition – is the power-law logic taken to its most reckless extreme, and Mallaby doesn’t let Masayoshi Son off easy for it. Read this if you want to understand the industry that funds nearly every tech company you’ve heard of, warts included.

Book Summary

Venture capital returns follow a power law, not a normal distribution -- a handful of investments (Google for Kleiner Perkins and Sequoia, for instance) generate the overwhelming majority of a fund's total returns, while most portfolio companies fail or return modest multiples. The entire business model is built around this asymmetry: make enough bets, be right about a few, and the losers barely matter.

The book traces VC's evolution from a clubby, reputation-driven Sand Hill Road business (Arthur Rock, Don Valentine at Sequoia, Kleiner Perkins) into a much more institutionalized, competitive, and global industry, with SoftBank's Masayoshi Son representing a newer, far more aggressive style of writing enormous checks to win deals through sheer capital size rather than careful diligence.

Mallaby is candid about VC's failure modes too -- WeWork and Adam Neumann are the book's clearest cautionary case, where SoftBank's check-size-as-strategy approach helped inflate a company's valuation and ambitions well past what its fundamentals supported, showing that the same power-law logic that builds legendary funds can also fund legendary disasters.

Top 8 Lessons from The Power Law

1. Venture capital returns are driven by power-law outliers, not consistent stock-picking -- a fund's success usually comes down to one or two enormous wins covering every other loss.
2. Because of the power-law dynamic, top VCs are incentivized to back founders who could plausibly become a 100x outcome, not founders who look like the safest bet.
3. Access to the best deals compounds over time -- a firm's reputation from one generation of wins (Sequoia backing Apple, then Google) makes it easier to get into the next generation's best deals.
4. Writing unusually large checks (SoftBank's Vision Fund strategy) can itself become a competitive advantage, letting a firm win deals purely through capital size rather than superior judgment.
5. The same capital-size strategy that wins access to hot deals can also inflate a founder's ambitions and valuation beyond what the business can support, as WeWork showed.
6. VC due diligence has real limits -- sophisticated investors backed Adam Neumann and WeWork despite governance red flags that look obvious in hindsight.
7. Venture capital has globalized and institutionalized considerably since its Sand Hill Road, handshake-deal origins, becoming a much larger and more competitive capital market.
8. A VC firm's culture and decision-making process (partnership consensus vs. a single powerful figure like Masayoshi Son) shapes which kinds of bets it's willing to make.

Top 3 Quotes from The Power Law

"Venture capital was about backing 10 horses, nine of whom you know are going to fall before the final hurdle, but one is going to strike enormously rich. It was originally called 'adventure' capital."

Sebastian Mallaby, The Power Law

"You succeed in venture capital by backing the right deals, not by haggling over valuations."

Sebastian Mallaby, The Power Law

"Was this luck, or was it more than that? Proving skill is difficult in venture investing because it hinges on subjective judgment calls rather than objective metrics."

Sebastian Mallaby, The Power Law