This research identifies the conditions that contribute to the rise of durable state rivals that persist over time and do not attempt to overthrow the state. I use a case study of Hezbollah in Lebanon and find that a weak state, foreign state sponsorship, and local support contribute to the rise of durable state rivals. The same conditions that enable the rise of a durable state rival make it more difficult for a durable state rival to overthrow the state. Durable state rivals exist within state borders, possess a high level of social control over a community within the state, and challenge the authority and legitimacy of the state, but they do not attempt to overthrow the state.