- Preface: How to Read This Book
- Part I — The Question and Its Framing
- 1. Introduction: The Question "What Is Web3?" and Why It Resists a Simple Answer
- 2. A Reader's Primer: Computers, Networks, and Software in Plain Language
- Part II — Historical and Conceptual Genesis
- 3. The Internet and the World Wide Web: Origins and Architecture
- 4. Web 1.0: The Read Era (1990s–early 2000s)
- 5. Web 2.0: The Read–Write Era and the Platform Economy
- 6. The Discontents of Web 2.0: Centralization, Surveillance Capitalism, and the Data Question
- 7. The Etymology and Intellectual History of "Web3"
- Part III — Technical Foundations, Explained Accessibly
- 8. Cryptography for Non-Specialists: Hashing, Keys, and Digital Signatures
- 9. Advanced Cryptography: Zero-Knowledge Proofs and the Privacy Frontier
- 10. Distributed Systems, Trust, and the Byzantine Generals Problem
- 11. The Blockchain: Data Structure, Ledger, and Immutability
- 12. Bitcoin: The First Working Application of the Blockchain
- 13. Ethereum and Smart Contracts: The Programmable Blockchain
- 14. Consensus Mechanisms: Proof of Work, Proof of Stake, and Their Trade-offs
- 15. Scaling and Connecting Blockchains: Layer-2s, Interoperability, and Multichain Visions
- Part IV — The Components of Web3
- 16. Tokens: Cryptocurrencies, Fungible Tokens, and Stablecoins
- 17. Non-Fungible Tokens (NFTs) and the Idea of Digital Ownership
- 18. Wallets, Keys, and Self-Custody: The Mechanics of "Owning"
- 19. Decentralized Finance (DeFi)
- 20. Decentralized Autonomous Organizations (DAOs) and On-Chain Governance
- 21. The Organization as Protocol: Toward the Trustless Firm
- 22. Decentralized Identity, Reputation, and Naming
- 23. Decentralized Storage and Computation
- 24. Oracles, Bridges, and the Link to the Off-Chain World
- Part V — Defining Web3
- 25. Toward a Definition: "Read, Write, Own" and Competing Framings
- 26. Web3 as Ideology: Decentralization, Cypherpunk Roots, and the Politics of Trust
- 27. Disentangling the Terms: Web3 vs. the Semantic Web (Web 3.0) vs. the Metaverse
- Part VI — Applications, Evidence, and Critique
- 28. Use Cases and Case Studies: Finance, Art, Gaming, Identity, and the Public Sector
- 29. Critiques and Skepticism: Hype, Scams, and Recentralization in Practice
- 30. Externalities: Environmental, Economic, and Social Dimensions
- 31. Law, Regulation, and Policy
- 32. Security, Risk, and the Human Factor
- Part VII — Synthesis and Future
- 33. The State of the Evidence: What Can and Cannot Be Claimed
- 34. Possible Futures and Open Research Questions
- 35. Conclusion: A Considered Answer to "What Is Web3?"
- Back Matter
- Glossary of Terms
- Appendix: A Timeline of the Web and Web3
- References
The Web3 Book
Making Sense of the Internet's Next Era
Everyone has heard of Web3, crypto, blockchains, NFTs, and DAOs. Almost no one can say, clearly, what any of it actually is — or whether it's the future of the internet or an elaborate way to lose money. The Web3 Book finally gives you a straight answer.
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About the Book
It starts where every honest explanation should: not with blockchains, but with how the internet itself works — and what, exactly, people find broken about it. From there it builds, one clear step at a time, to what Web3 really proposes: an internet where you, not platforms, control your own identity, your data, and your money.
This is neither a sales pitch nor a takedown. Every term is explained in plain language with a real-world analogy — no jargon, no hand-waving, and no assumption that you've ever set up a "wallet" or written a line of code. Every claim is weighed against the evidence, so you can tell the genuine breakthroughs from the hype.
Across 35 short chapters you'll come to understand the ideas everyone name-drops but few can explain: cryptography, blockchains, Bitcoin and Ethereum, smart contracts, tokens and stablecoins, NFTs, DeFi, DAOs, and the bold idea that an entire organization can run as code. You'll also get the honest other side: the scams, the collapses, the environmental questions, and the regulation now taking shape.
By the end, you won't just have a definition of Web3 — you'll have a way of thinking that lets you cut through the noise around any new technology and decide for yourself what's real.
Whether you're curious, skeptical, or simply tired of nodding along, this is the guide that finally makes it all make sense.
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About the Author
Bruno Pierri Galvao is a blockchain engineer who has spent years building in and around the Web3 space. He wrote *The Web3 Book* out of a simple frustration: the technology is genuinely interesting, but almost everything written about it is either impenetrable jargon or breathless hype. His aim is to explain what is actually happening — clearly, honestly, and without assuming the reader is already an expert.
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