The Merge
Ethereum's 2022 transition from proof-of-work to proof-of-stake consensus.
Explain Like I'm 12
Ethereum's 2022 transition from proof-of-work to proof-of-stake consensus.
Why It Matters
Ethereum-specific terms explain its execution environment, standards, accounts, and scaling roadmap.
How It Works
The Merge turned off the proof-of-work consensus where miners solved math problems to secure the network. Instead, it enabled the proof-of-stake consensus layer (the Beacon Chain) to become the final authority for all transactions, where validators now reach consensus based on their staked assets.
Real-World Example
Immediately after The Merge, the carbon footprint of the Ethereum network dropped by nearly 100%, effectively silencing criticisms regarding the network's environmental sustainability.
Advantages
- Over 99% energy reduction
- Improved economic sustainability for ETH
- Foundation for future scalability
Limitations
- Did not immediately solve gas fees
- Requires long-term validator health
- Complexity introduced new risk vectors
Common Misconceptions
- Many people believe The Merge lowered gas fees, but it was purely a consensus transition and not a scalability upgrade.
- Some thought the transition would cause the network to go offline, but the switch occurred seamlessly without downtime.
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Related Terms
EIP
An EIP (Ethereum Improvement Proposal) is a formal design document that provides information to the Ethereum community or describes a new feature for the Ethereum protocol, its client APIs, or contract standards. EIPs are the primary mechanism for proposing changes to Ethereum, following a rigorous peer-review and consensus process. They ensure that changes to the protocol are vetted by the community, developers, and researchers before being implemented through a hard fork or network upgrade.
EVM
The Ethereum Virtual Machine (EVM) is a decentralized, Turing-complete computation engine that executes smart contracts on the Ethereum network. It functions as a global state machine, where the state is updated based on code execution on the blockchain. Because the EVM is implemented by every node in the network, it ensures that smart contracts run exactly as intended across all devices, regardless of local hardware differences. This allows for complex, programmable logic to be embedded into the blockchain.
Ethereum
Ethereum is an open-source, decentralized blockchain network that enables the creation and execution of smart contracts and decentralized applications (dApps). Launched in 2015, it introduced the concept of a programmable blockchain, moving beyond simple peer-to-peer value transfers. By utilizing the Ethereum Virtual Machine (EVM), it allows developers to build self-executing code that operates without intermediaries, censorship, or downtime, creating a foundation for a new internet economy, often referred to as Web3.
Smart Contract
A smart contract is a self-executing program stored on a blockchain that automatically runs when predetermined conditions are met. These contracts eliminate the need for intermediaries by encoding terms directly into lines of code, ensuring that the agreement is enforced exactly as written without human interference. Because they reside on an immutable ledger, the execution results are verifiable, transparent, and impossible to tamper with once deployed.
Smart Contract
A self-executing program stored on a blockchain that automatically enforces and executes the terms of an agreement when predetermined conditions are met. Smart contracts are deterministic, immutable once deployed, and form the backbone of decentralized applications.