Hoffer published The True Believer in 1951. In it he described the mass movement that cannot find a charismatic leader: it splinters into autonomous cells, each pursuing the doctrine on its own initiative, without waiting for instructions from the center. He called this the "leaderless movement" and argued it was actually more durable than leader-dependent movements — because you cannot decapitate what has no head.
Boot published Invisible Armies in 2013. In a chapter on al-Qaeda, he describes the ISIS franchise model: autonomous cells operating on shared doctrine without direct command-and-control from bin Laden or al-Zawahiri. He attributes the innovation to al-Qaeda's post-9/11 operational adaptation — the decentralization was a response to being hunted. But the structural description is Hoffer's leaderless movement verbatim, written 62 years earlier, derived from observations about 20th-century mass movements with no access to al-Qaeda.
Cross-domain: The same pattern appears in open-source software (Linux doesn't need Torvalds to be present; the doctrine is in the codebase). It appears in decentralized political movements (the alt-right in 2015 had no leader — the shared "irony" doctrine organized behavior). Every movement that replaces personality cult with doctrinal clarity is rediscovering Hoffer's structural solution. The insight neither Boot nor Hoffer generates alone: decentralization is not organizational innovation, it is structural inevitability when leader-dependence becomes a liability.
Essay seed: "Hoffer predicted ISIS in 1951 — and what else he may have described before it happened." The argument: Hoffer's structural analysis of mass movements generates accurate descriptions of organizational forms that didn't exist when he wrote — because the structural pressures that produce those forms are recurrent. The essay would identify three or four cases where The True Believer describes (in different vocabulary) something that looks like a contemporary phenomenon. Not as prediction, but as structural necessity. Could include: franchise terrorism, online political movements without leadership, open-source ideology, brand-based extremism.
Open question: Which passages in The True Believer contain structural descriptions that haven't yet been instantiated at scale — or that are currently being instantiated and not yet recognized as what they are?
[ ] A second source touches this independently [ ] Has survived two sessions without weakening [x] The Live Wire second and third framings hold [x] Has a falsifiable core claim (leaderless movement structure recurs under decapitation pressure; Hoffer described the structural solution; ISIS rediscovered it)