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<p>Vitalik Buterin reverses his 2017 stance, arguing zk-proofs now make “mountain man” full verification a real fallback as Ethereum stress-tests decentralization.</p>
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   <li>Ethereum co-founder Vitalik Buterin revisits a 2017 clash with Ian Grigg, now favoring designs where users can fully verify state instead of outsourcing trust to nodes and devs.<a href="https://coinedition.com/buterin-walks-back-2017-take-as-zk-proofs-make-full-verification-practical/" target="_blank" rel="noopener noreferrer nofollow"></a></li>
   <li>He calls ZK-SNARKs a “magic pill” that lets users check chain correctness without replaying every transaction, easing old block-size tradeoffs.<a href="https://cryptorank.io/news/feed/7b7b1-vitalik-buterin-reconsiders-2017-view-on-full-chain-validation" target="_blank" rel="noopener noreferrer nofollow"></a></li>
   <li>Citing censorship, outages, and validator concentration, he frames the “mountain man’s cabin” as Ethereum’s BATNA: a rarely-used but essential verification fallback.<a href="https://cryptorank.io/news/feed/c4fde-buterin-walks-back-2017-take-as-zk-proofs-make-full-verification-practical" target="_blank" rel="noopener noreferrer nofollow"></a></li>
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<p>Ethereum (<a href="https://crypto.news/price/ethereum/" rel="noopener noreferrer nofollow">ETH</a>) co-founder Vitalik Buterin has publicly walked back a long‑standing critique of “mountain man” full verification, arguing that advances in zero‑knowledge proofs and a harsher view of real‑world failure modes now justify much stronger user‑level guarantees than he once thought realistic. “I no longer agree with this previous tweet of mine – since 2017, I have become a much more willing connoisseur of mountains,” he wrote, revisiting a debate that has haunted blockchain design for nearly a decade.</p>
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   <p>I no longer agree with this previous tweet of mine – since 2017, I have become a much more willing connoisseur of mountains. It's worth explaining why.<a rel="noopener noreferrer nofollow" href="https://t.co/SRvRtuFKQu">https://t.co/SRvRtuFKQu</a><br><br>First, the original context. That tweet was in a debate with Ian Grigg, who argued that blockchains…</p>— vitalik.eth (@VitalikButerin) <a href="https://twitter.com/VitalikButerin/status/2015599527370293422?ref_src=twsrc%5Etfw" target="_blank" rel="noopener noreferrer nofollow">January 26, 2026</a>
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<h2 class="wp-block-heading" id="from-griggs-minimalist-chain-to-merkle-roots">From Grigg’s minimalist chain to Merkle roots</h2>
<p><a href="https://crypto.news/vitalik-institutions-push-ethereum-to-decentralization/" rel="noopener noreferrer nofollow">Buterin</a>’s original position emerged in a 2017 clash with financial cryptographer Ian Grigg, who argued that blockchains should “track the order of transactions, but not the state (eg. user balances, smart contract code and storage).” In Grigg’s model, “the messages are logged, but the state (e.g., UTXO) is implied, which means it is constructed by the computer internally, and then (can be) thrown away.”</p>
<p>You might also like: <a href="https://crypto.news/jesse-pollak-rejects-behind-the-scenes-token-price-boosts-on-base/" rel="noopener noreferrer nofollow"> Jesse Pollak rejects ‘behind-the-scenes’ token price boosts on Base </a></p>
<p>Buterin says he opposed that philosophy because it forces users either to “run a node that processed every transaction in all of history, or trust someone else.” Instead, Ethereum commits state directly in block headers so “you can simply prove any value in the state with a Merkle branch,” under an honest‑majority assumption where “if &gt;= 50% of the consensus participants are honest, then the chain with the most PoW (or PoS) support will be valid.”<a rel="noopener noreferrer nofollow" target="_blank" href="https://x.com/VitalikButerin/status/2015599527370293422"></a></p>
<h2 class="wp-block-heading" id="zksnarks-as-the-missing-pill">ZK‑SNARKs as the missing “pill”</h2>
<p>What changed, in his telling, is the maturation of ZK‑SNARKs. “We now have a technology that lets you verify the correctness of the chain, without literally re-executing every transaction,” Buterin wrote. “WE INVENTED THE THING THAT GETS YOU THE BENEFITS WITHOUT THE COSTS!” He likens this to “a clearly working pill that anyone could make for $15 that cured all diseases,” arguing that if such a pill existed, “healthcare becomes super affordable so everyone is happy.”<a rel="noopener noreferrer nofollow" target="_blank" href="https://dailycoin.com/vitalik-revisits-bitcoins-block-size-war-backs-technology/"></a></p>
<p>Zero‑knowledge systems already underpin zk‑rollups that compress transaction data and offload computation while preserving verifiability, allowing millions of computation steps to be checked “in a very fast way” without redoing the work. For Buterin, this eliminates much of the old block‑size tradeoff: scalability no longer has to mean blind trust in intermediaries.<a rel="noopener noreferrer nofollow" target="_blank" href="https://www.mikkoikola.com/blog/2023/1/9/exploring-ethereum-scalability-what-are-zero-knowledge-proofs-and-zkevm"></a></p>
<h2 class="wp-block-heading" id="mountain-mans-cabin-as-systemic-batna">“Mountain Man’s cabin” as systemic BATNA</h2>
<p>Equally important is a shift from academic models to messy reality. “In the real world, lots of things break,” he concedes, listing p2p outages, latency spikes “from its usual ~200ms to 1000–5000ms,” centralized staking, and censorship, including Tornado Cash, where “your&nbsp;<em>only</em>&nbsp;option becomes to directly use the chain.” In that world, “THE ANSWER TO THE ABOVE CONUNDRUMS CANNOT ALWAYS BE ‘CALL THE DEVS’,” he warns, arguing that developers themselves risk becoming a central point of control.<a rel="noopener noreferrer nofollow" target="_blank" href="https://www.kucoin.com/news/flash/vitalik-buterin-reverses-2017-blockchain-verification-view"></a></p>
<p>Instead, Buterin reframes the “Mountain Man’s cabin” as a BATNA – a “Best Alternative to a Negotiated Agreement” – that users may rarely inhabit but must know exists. “We do not need to start living every day in the Mountain Man’s cabin,” he writes. “But part of maintaining the infinite garden of Ethereum is certainly keeping the cabin well-maintained.”<a rel="noopener noreferrer nofollow" target="_blank" href="https://cryptoadventure.com/heres-why-the-ethereum-fallback-vitalik-buterin-once-rejected-is-back-on-the-table/"></a></p>
<h2 class="wp-block-heading" id="market-snapshot-crypto-reacts-in-a-maturing-landsc">Market snapshot: crypto reacts in a maturing landscape</h2>
<p>Buterin’s rethink lands in a market that continues to price <a href="https://crypto.news/fundstrats-tom-lee-sees-bitcoin-and-ethereum-price-breakout-after-precious-metals-peak/" rel="noopener noreferrer nofollow">Ethereum</a> as critical settlement infrastructure. <a href="https://crypto.news/ethereum-price-falls-coinbase-premium-decline-2026/" rel="noopener noreferrer nofollow">Ether</a> trades today around 2,922.90 dollars, up roughly 0.34% over the last 24 hours, with daily volume above 25.4 billion dollars. Bitcoin remains the bellwether above 70,000 dollars on major venues, while large caps like Solana and other smart‑contract platforms show low‑single‑digit percentage moves over the same period, reflecting a market that increasingly prices execution, censorship‑resistance, and verification assurances as core fundamentals rather than ideology.</p>
<p>Read more: <a href="https://crypto.news/erc-20-stablecoins-log-first-major-cap-drop-of-this-market-cycle/" rel="noopener noreferrer nofollow"> ERC-20 stablecoins log first major cap drop of this market cycle </a></p>

Vitalik Buterin embraces ‘mountain man’ verification as zk-proofs mature on Ethereum

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