The a16z Show Ben Horowitz & Marc Andreessen: Why Silicon Valley Turned Against Defense (And How We’re Fixing It)
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Nov 19, 2025 
Ben Horowitz, a Silicon Valley entrepreneur and co-founder of a16z, teams up with tech pioneer Marc Andreessen, along with Catherine Boyle and David Ulevitch, to explore the shift in Silicon Valley's relationship with defense. They discuss how recent geopolitical events, like Ukraine, have reignited interest in defense technology. The conversation highlights the urgent need for innovation in U.S. manufacturing and defense, comparing America's chaotic creativity to China's centralized planning. Insights on reindustrialization and new investment opportunities in energy, aerospace, and public safety spark an invigorating vision for the future.
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Unbundling Space Lowers Barriers
- Space 2.0 unbundles vertical integration: specialized firms build satellite buses, ground stations, and subsystems faster.
- This modular approach shortens timelines and opens new entry points versus building everything in-house.
Work With The Pentagon And Primes
- Engage the Pentagon now; procurement reforms and Congress are moving faster and funding downstream growth.
- Build partnerships with legacy primes to scale quickly and access existing contracts.
Europe's Rearmament Is A Market
- Ukraine shifted European defense spending upward, creating export markets for U.S. companies.
- Allies increasing defense budgets expand addressable markets beyond U.S. procurement alone.