The Institution Nobody Is Running
Something can look exactly like a rule being enforced and be nothing of the kind. It can be five or six people, none of them in charge of anything, each doing the arithmetic on their own situation and landing, independently, on the same answer. From outside, the pattern reads as order. From inside, there was never a decision to hold a line, because there was never a line, just a set of separate people who each concluded that moving first would cost more than staying put.
Browser rendering is a clean version of this. No authority makes a rendering engine follow the spec. Compliance is voluntary, and every vendor could diverge tomorrow. What keeps them close to the standard is that a page rendering wrong on your engine and right on everyone else's is a cost you eat alone, immediately, in lost users. So each vendor runs its own calculation, arrives at "match the spec," and the aggregate looks like a rule being policed. It isn't. It's four or five actors solving the same optimization in parallel and getting the same output, which is a different thing wearing the same clothes.
Succession disputes without a clear hierarchy do this too. A leader dies, several generals each hold enough force to plausibly seize the whole thing, and none of them do, at least not right away. It's tempting to read the calm as a customary law of inheritance quietly doing its job. More often, each general has looked at what the others would do if he moved first, decided the retaliation isn't worth the prize yet, and sat still. Multiply that calculation across everyone with a claim, and what emerges is a stable-looking division of territory or a deferred handoff that nobody designed and nobody is enforcing. It just happens to be everyone's best answer to everyone else's best answer, at the same time.
The reason this distinction matters is where it tells you to look for risk. If you think an institution is enforcing the order, you watch the institution. You assume the arrangement holds as long as the enforcer stays intact, and you get nervous when the enforcer looks weak. But if the order was never enforced, only coincidentally aligned, the enforcer's health was never the load-bearing variable. What was load-bearing is each actor's private calculation, separately, continuously, and any one of them can update without anyone else defecting from anything. Nobody has to break a rule for the arrangement to end. Someone just has to get new information, about their own strength or someone else's weakness, that changes what their least-bad option is. The moment that happens, the pattern that looked like a fence turns out to have been a coincidence, and it stops instantly, with no violation to point to.
This is also why the aftermath of these collapses tends to look confused rather than scandalous. When an enforced rule breaks, there's a violator, and the story writes itself. When a coincidence stops coinciding, there's no one to blame, because no one was ever holding anything. The general who moves isn't defying a norm of succession, he's just updated his arithmetic. The vendor who diverges from the spec isn't cheating, it's decided the interoperability cost is now affordable given its market position. Everyone else, who was reading the old alignment as a rule, experiences the change as betrayal, but there was nothing to betray. There was only a set of independent bets that used to land in the same place.
None of this means order is fake or that institutions never enforce anything. Some genuinely do, with a body and a budget behind the line. The problem is that from a distance, enforced order and coincidental alignment produce the identical surface: everyone doing the same thing, consistently, over time. You can't tell which one you're looking at by watching the pattern hold. You can only tell by asking what happens to each actor's calculation if their situation changes, one at a time, and whether the others would even notice before it was too late to respond.
The tell isn't whether the order holds. It's whether anyone could tell you, in advance, what would make it stop.