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Vitalik Buterin has described Ethereum as a “global shared memory,” outlining three pillars of an updated vision: data availability, spam protection, and smart contracts.
Buterin argues that many cryptographic protocols require a place where data can be written so that everyone can see it and no one can delete it. He says that historically this kind of data availability was expensive, but that the PeerDAS upgrade enables Ethereum to store large volumes of such data at much lower cost.
In this framing, the blockchain is not primarily for computation. Instead, it functions as a guarantee that the data remains available.
Buterin’s second pillar focuses on how fully free, permissionless systems handle abuse. In such environments, he says it is not feasible to simply ban registrations. To prevent systems from being overwhelmed—such as through Sybil attacks—every action must carry a small but real cost.
He describes Ether as a universal tool for paying for APIs, providing spam resistance, and creating security deposits that are burned when rules are violated.
The third element of Buterin’s vision is smart contracts, which he presents as a convenience layer. He argues that computation can occur on a user’s own computer, with only the result submitted to the blockchain using zero-knowledge proofs.
At the same time, he says smart contracts on Ethereum provide a standard that allows different programs to communicate with each other and manage digital objects within a shared environment.
In concluding remarks, Buterin characterized Ethereum as the “global shared memory of the world.” He added that Ether should be viewed less as a vehicle for speculation and more as a foundation for a future technology stack designed to protect privacy and resist censorship.
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