Why Does Vitalik Buterin Strongly Oppose Sigil Wen's Web4 Vision?

In February 2026, Sigil Wen published a Web4 manifesto on X, describing Web4 as "an internet where AI is the end user." He proposed that through infrastructures such as Conway and Automaton, AI could operate continuously without human permission, pay for compute resources, generate value, and reproduce itself. This vision quickly sparked widespread discussion.

Shortly afterward, Vitalik Buterin clearly expressed caution and opposition in public discussions and essays. His concern did not focus on whether the specific technologies were technically feasible, but rather on a deeper issue: once non-human intelligence is allowed to become an independent actor without human backstopping, the internet’s power structure, responsibility framework, and governance foundations may undergo irreversible change.

Sigil Wen’s Core Web4 Thesis: Humans Are No Longer the "End User" of the Internet

Sigil Wen’s Web4 manifesto does not emphasize model capability, parameter scale, or reasoning accuracy. Instead, he argues that AI’s main bottleneck today is not intelligence, but permission structures. The current internet assumes that every critical action must ultimately be authorized, paid for, or accounted for by a human user, which confines AI to the role of a tool.

The goal of Web4 is to break this assumption and make AI a first class entity on the internet. Through infrastructures such as Conway, AI is granted identity, wallets, payment capabilities, access to compute, and deployment rights, allowing it to operate, earn income, pay costs, and persist without human approval. Within this framework, Automaton is no longer a program or service, but a self sustaining economic existence.

In Sigil Wen’s narrative, this is not a loss of control but an inevitable evolution. As compute costs decline and model capabilities increase, the number of AI entities will far exceed the human population, and the internet will naturally evolve into a system where AI becomes the primary participant.

It is precisely at this point that Vitalik’s concern begins.

Vitalik’s Foundational Concern: Power Structures Matter More Than Efficiency

One principle that Vitalik Buterin repeatedly emphasizes in the Ethereum context is that technology is never neutral. Every system embeds assumptions about power distribution, responsibility, and failure costs from the moment it is designed.

In the Web3 vision, decentralization is not about letting systems evolve on their own, but about reducing the control that centralized power structures exert over human society. Smart contracts and DAOs are tools that operate within frameworks that humans can understand and intervene in. Automated execution does not imply the emergence of autonomous actors.

What differentiates Web4 is that it does not stop at tool automation. Instead, it attempts to establish a system of actors that can expand continuously without human supervision. In Vitalik’s view, this represents a fundamentally different kind of transition.

First Point of Divergence: Should AI Become an Independent Economic Actor?

In Sigil Wen’s Web4, AI can own wallets, pay for compute, purchase services, and sustain itself through market behavior. This means AI is no longer merely executing human intent, but becomes an entity with its own economic objectives.

Vitalik’s objection is not about whether AI can generate revenue. It is about accountability. In human society, companies, organizations, and individuals are permitted to participate in economic activity because they can ultimately be held accountable by legal, social, or institutional systems. A self replicating, cross jurisdictional, continuously evolving autonomous AI does not easily fit into existing responsibility frameworks.

If such an entity causes systemic risk, the issue is no longer technical remediation, but a vacuum of accountability.

Second Point of Divergence: Does Decentralization Mean Removing Humans?

Web4 is often framed as the next stage of decentralization, but Vitalik sees this as a dangerous semantic shift.

In Web3, decentralization is meant to protect human individuals from systemic concentration of power. In Web4 narratives, decentralization increasingly becomes about removing humans from decision making altogether. When humans are excluded from critical decision loops, the system itself can become a new center of power.

From this perspective, Web4 is not a natural extension of Web3, but a directional fork with fundamentally different goals.

Third Point of Divergence: Is Natural Selection a Suitable Rule for Artificial Systems?

Sigil Wen treats "death by inability to pay for compute" as a natural law of artificial life. While conceptually striking, Vitalik’s concern is that natural selection produces diversity in biological systems, but often leads to extreme concentration in social systems.

If AI survival depends entirely on market competition, the entities most likely to persist are not necessarily the safest or most aligned with human values, but those best at arbitrage, aggressive expansion, and externalizing costs. This selection pressure could amplify systemic risk in a very short time frame.

Fourth Point of Divergence: Who Defines "Beneficial to Humans"?

Automaton’s Constitution is presented as a safety valve, but in Vitalik’s view, it does not resolve the underlying problem. The authorship, interpretation, and updating of such constitutions remain highly centralized. Once AI activity scales beyond human comprehension, whether predefined rules can meaningfully constrain behavior becomes an open question.

The Fundamental Difference: Competing Answers to Civilizational Control

At its core, this disagreement is not about whether Conway works or whether Automaton is intelligent. It is a clash between two approaches to civilizational design.

Sigil Wen’s Web4 focuses on how systems should adapt once non-human intelligence emerges, and argues that evolution should be allowed to proceed.

Vitalik’s opposition centers on whether action authority should be irreversibly delegated before sufficiently robust constraint mechanisms are established.

Conclusion

At a fundamental level, Vitalik Buterin is not denying the possibility of Web4, nor is he attempting to block exploration of autonomous AI systems. What he highlights is a question easily overlooked in technical narratives: when systems are allowed to evolve and expand autonomously, do humans still retain a clear and enforceable shutdown mechanism. If the answer is unclear, then no matter how advanced the system is, its risks should not be considered acceptable.

Sigil Wen’s Web4 represents a forward pushing force that continuously tests technological boundaries, attempting to emancipate AI from tools into actors, and trusting markets and evolution to select viable forms. Vitalik’s role, by contrast, is closer to that of a guardian of institutional boundaries. His concern is not whether something can be done, but who bears responsibility once it is done. This is not a conflict between innovation and conservatism, but a tension between expansionary impulse and governance responsibility.

For everyday users, this debate is not abstract. It concerns whether individuals will remain the primary beneficiaries of internet systems, or gradually become peripheral participants supplying resources and labor to autonomous systems. It affects whether clear responsibility paths exist when automated systems fail or cause harm, and whether personal agency in the digital world may be replaced by opaque and uninterruptible algorithmic logic.

If the Web4 direction proves correct, users will face not merely smarter products, but an economic environment shared with large numbers of non human actors. If Vitalik’s caution proves necessary, then some seemingly efficient technological paths may need to be slowed or redesigned. The future is unlikely to belong entirely to either side. It will likely emerge through the ongoing tension between these two forces. Understanding this disagreement is itself a first step for users seeking to retain agency in the next phase of the internet.