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The largest innovation fortunes tend to cluster around three forces. The first is platform leverage — building the rails that other businesses are forced to run on, so that every downstream success pays a toll upward. Software marketplaces, payment networks, cloud infrastructure, and app ecosystems all follow this pattern.

The second is capital intensity as a moat. Spaceflight, semiconductor fabrication, gigafactories, and frontier AI models all cost so much to attempt that only the very wealthy or the very well-funded can even enter the race. That barrier, once crossed, protects the incumbent for years.

The third is timing and conviction. The billionaires who look prescient in hindsight usually made an unfashionable bet — electric vehicles when they were a punchline, online retail when it lost money, large language models before they worked — and held it through the doubt. Innovation wealth rewards the willingness to be early and alone.