Every blockchain today relies on replication techniques first developed in the 1980s by researchers who weren't thinking about cryptocurrencies at all.

In this episode, Tim Roughgarden speaks with MIT professor and Turing Award winner Barbara Liskov, one of the pioneers of programming languages, fault tolerance, and distributed systems. Joined by a16z crypto research partner Ittai Abraham, they trace the evolution of ideas that now underpin modern blockchain networks.

The conversation explores viewstamped replication, Practical Byzantine Fault Tolerance (PBFT), state machine replication, and why concepts developed decades before Bitcoin became the foundation for today's blockchain protocols. Along the way, Liskov reflects on the relationship between theory and practice, the importance of modularity and formal reasoning, and why AI is creating a new generation of systems research.

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Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

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What does it take to build a global mobility company from a country of just 1.3 million people?

Markus Villig, founder and CEO of Bolt, joins the show to share how he scaled from Estonia to 50+ countries, navigating early scrappy days, a near-bankruptcy from expanding too fast, and the hard-won lessons behind Bolt’s capital-efficient growth.

They also discuss building in Europe vs. the U.S., competing against much better-funded rivals, and why culture and ambition matter more than regulation.

Finally, Markus lays out what’s next: autonomy, robotaxis, and why the future of mobility will be a hybrid of human drivers and self-driving fleets.

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Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

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Ben Horowitz is joined by Anne Neuberger, Raghu Raghuram, and Jen Kha to discuss a16z's expanding international strategy and the growing role technology plays in economic growth, national security, and global partnerships.

The conversation explores why America's technology leadership matters beyond Silicon Valley, how AI is reshaping relationships between governments and the private sector, and why countries around the world are looking to adopt frontier technologies while building stronger innovation ecosystems of their own.

They discuss AI infrastructure, cybersecurity, defense technology, startup expansion, and what it takes to build enduring technology ecosystems. Along the way, they examine the role of trusted partnerships, the importance of Western technology, and why helping founders expand globally has become an increasingly important part of company building.

Resources:

Read more about a16z’s global mission: https://a16z.com/a16zs-global-mission/

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Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

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