The New York Agreement
By early 2017, the Bitcoin scaling debate had reached a stalemate. SegWit had been proposed by the Bitcoin Core development team but was being blocked by miners who refused to signal support. Meanwhile, the big-block camp was preparing what would become Bitcoin Cash. Into this deadlock stepped a group of business leaders who believed a compromise was possible.
On May 23, 2017, representatives from over 50 companies met at the Consensus conference in New York and signed the New York Agreement (NYA). The deal was simple: miners would activate SegWit (satisfying the Core developers), and in return, the block size would be doubled to 2 MB within six months (satisfying the big blockers). The signatories controlled approximately 83% of Bitcoin's hash power and included major companies like Coinbase, Bitmain, Blockchain.info, Xapo, and BitPay. On paper, it looked like the scaling war was over.
The NO2X Movement
The New York Agreement was signed without the participation of Bitcoin Core developers, most individual node operators, or the broader community of Bitcoin users. This exclusion proved fatal. A grassroots movement quickly formed under the banner "NO2X" — users changed their Twitter profiles, ran full nodes signaling opposition, and argued that no group of companies had the right to change Bitcoin's consensus rules.
The NO2X movement was philosophically significant because it articulated a principle that would define Bitcoin governance going forward: hash power does not equal authority. Just because miners and businesses could force a fork didn't mean they should. Bitcoin's rules, the movement argued, are determined by the economic majority — the people and businesses that actually use and hold Bitcoin — not by mining companies. This was a direct repudiation of the idea that Bitcoin is governed by miners, and it established the precedent that full node operators are the ultimate arbiters of Bitcoin's protocol rules.
The Cancellation
As the November 2017 activation date approached, it became increasingly clear that SegWit2x would not achieve consensus. The fork lacked replay protection — a technical safeguard that prevents transactions on one chain from being valid on the other. Without it, users risked losing funds on both chains when they made a transaction. Bitcoin Core developers refused to implement the change, and the SegWit2x development team (led by Jeff Garzik) was too small to maintain a credible alternative client.
On November 8, 2017, just days before the planned fork, the organizers posted a message to the SegWit2x mailing list: "Our goal has always been a smooth upgrade for Bitcoin. Although we strongly believe in the need for a larger block size, there is not sufficient consensus at this time." The fork was dead. Bitcoin's price, which had been volatile in the weeks leading up to the potential split, rallied sharply on the news.
Lessons Learned
The SegWit2x saga was a defining moment for Bitcoin governance. It established several precedents that continue to shape the network:
No backroom deals: A group of companies cannot change Bitcoin's rules by signing an agreement, no matter how much hash power they represent. Bitcoin's consensus process is rough, slow, and messy — but that is a feature, not a bug. It makes Bitcoin resistant to capture by any faction.
Users run the network: The NO2X movement demonstrated that ordinary users running full nodes have real power. When the economic majority refuses to upgrade, miners cannot force a hard fork. This is fundamentally different from how most organizations work, where decisions flow top-down.
The first part worked: Ironically, the SegWit activation that was part of the deal succeeded and remains one of Bitcoin's most important upgrades. It enabled the Lightning Network and increased effective block capacity. The failure was only in the "2x" part — the forced block size increase. In hindsight, SegWit2x was the last serious attempt to change Bitcoin through corporate pressure, and its failure cemented Bitcoin's reputation as a protocol that is extraordinarily difficult to alter without broad consensus.