The Ethereum Merge

SEP 15 2022 · 12:00

Ethereum logo. The network transitioned from proof-of-work to proof-of-stake on 15 September 2022. Place: Ethereum mainnet, block 15537394, approximately 06:42 UTC Figures: Vitalik Buterin, Ethereum co-founder · the Ethereum Foundation core developers · roughly 500,000 staking validators worldwide A Hard Fork Without a Schism At 06:42 UTC on 15 September 2022, the Ethereum network executes the most consequential live upgrade in the history of decentralized computing. The proof-of-work consensus mechanism, in which miners spend electricity to publish blocks, is replaced by proof-of-stake, in which validators bond capital and are economically penalized for misbehavior. The transition has been engineered for seven years, simulated on three intermediate testnets, and rehearsed by the entire validator set over the preceding weeks. The merge happens cleanly. Energy consumption falls by approximately 99.95 percent. The price barely moves. What makes the merge remarkable is not the engineering, which is remarkable enough. It is the governance. A network with no CEO, no headquarters, no board, no founding charter, no legal personality and no sovereign jurisdiction has coordinated hundreds of thousands of independent operators on three continents to swap out its consensus engine in mid-flight, without anyone losing access, without a chain split, without a court. The Sovereignty Question Reopens The merge demonstrates that the technical infrastructure of post-Westphalian institutions can evolve without a sovereign decision-maker. The Westphalian state's monopoly on the legitimate alteration of its own constitutive rules, the thing every revolution since 1789 has been about, is, in this domain, simply not at issue. The rules change because the community of stakeholders running the software agrees to run the new version. It also reopens an older question. By 2024 roughly a third of staked ether is concentrated in three providers: Lido, Coinbase, Binance. The validator set is wide; the operator set is narrow. Sovereignless governance, in practice, looks increasingly like stake-weighted oligarchy with technical extras. Whether that is an improvement on Westphalian sovereignty, a reproduction of it in a new register, or merely the early-medieval phase of something that has not finished settling, is a question to which mid-2026 has no answer. Video: Official Ethereum Foundation livestream from 15 September 2022 as the mainnet completed the long-promised transition from proof-of-work to proof-of-stake, cutting the network's energy consumption by roughly 99 percent.