This article aims to understand autonomism as an ideology of territorial order and institutional design. In particular, I ask whether the theory and practice of autonomism is consonant with federalist principles. '' Autonomism'' is a normative term that advocates the use of autonomist principles, and it has an intricate relationship with federalism, but is generally distinct from it. Autonomists are wary of federalism because they believe it has homogenizing and uniformizing tendencies. Autonomism as an ideology of territorial order and institutional design exhibits a number of clear anti-federalist stances, but yet it is based on the general federalist principle that multiple levels of government can lead to better governance in multinational states. To this complex anti-federalist and federalist hybrid stance, autonomism adds a nuanced anti-secessionism stance. Autonomism In many multinational democracies, models of federation are the preferred institutional configuration to address the complexities of multinationalism, and much of the scholarly literature echoes this preference for federation (