Arbitrum has on-chain rollup contracts enforcing settlement, a single centrally operated sequencer, a DAO, a foundation, and a security council with emergency multisig power.
So which part governs the system?
β’ The rollup contracts govern state validity, where validators submit assertions about Arbitrum's state to Ethereum
β’ The sequencer decides transaction ordering, and is operated by the Foundation
β’ ARB token governance covers product decisions, economic parameters, treasury, actor set permissioning, technical parameters. BUT, decisions go through multi-stage timelocks and, critically, can be canceled by the Security Council.
β’ The Security Council can execute any software upgrade with no delay in a security emergency.
β’ The Arbitrum Foundation gates Security Council election eligibility and enforces compliance requirements.
The implication: Whilst itβs true that the DAO has a broad set of rights across the system, it is also a meaningfully smaller claim than "ARB governs Arbitrum." Each stakeholder in the system have both distinct and overlapping responsibilities within the system.
This is why Arbitrum has a hybrid operating model, and hybrid governance. Every label is doing real analytical work here, and each is visible on the profile.
And which part governs the system? The answer depends entirely on where you draw the boundary. Learn more about how we draw those boundaries and about ARBβs role in its system at
fundamentals.fyi/token/arbitβ¦