This article looks at the Chocó Department, where black and indigenous ethnic movements demanded collective land rights and autonomy to safeguard local livelihoods from resource-intensive economies. However, after decentralization and state restructuring reforms granted constitutional protections of local ethnopolitical autonomy in the nineties, most indigenous and black communities failed to benefit from the new rights. This has been explained as the result of human rights violations, neoliberal development, and armed groups' appropriation of regional economies, which created stressful conditions for self-governance. In such a scenario, autonomy was maintained only by communities that could resist violence and hold regional or national governments accountable. I build on these claims and add that the difference between the intent and the actual outcome of the reforms is explained by the way new institutions were territorialized or adapted by specific actors to local dynamics. In the Chocó Department, reforms were territorialized in a context of weak institutions, government corruption, and resource-intensive land-use changes that worked against ethnopolitical autonomy by enabling local intermediaries, who frequently made decisions that went against community rights.