Two forces, racing
Picture any commons, the water under your town, the seed in a farmer's hand, a plant, a medicine, as a field that can be slowly fenced. Two things are happening at once. The fence is going up, funded by the fences already built, which is why it speeds up. And a public is, or is not, learning to see the fence for what it is while the gate is still open. The whole story is a race between those two: the fence closing, and the public waking up.
Call the share of the commons already fenced F, for enclosed, and call the share of the public that can see the pattern A, for awareness. Each one changes the other. The more the public sees, the harder it is to keep fencing in the dark. The more gets fenced in plain sight, the more the public learns to see. But there is a leak in awareness, called forgetting, and it never stops draining. The model is just these two sentences, written as math.
Out of those two lines falls a single dividing condition, the thing the whole model is really about:
Run the race yourself
Start with the four presets. Defended and Lost show the two fates. Tipping point sits on the knife's edge. Organizing saves it shows a commons that the lens alone could never save, rescued by a steady campaign. Then drag Forgetting λ up slowly on the Defended preset and watch the dashed awakening line slide right until the whole thing flips.
You win on the side of the equation you control
The procedure has more capital and better lawyers, and it sets α. You never touch α. But every losing board can be flipped with the three levers on the other side of the threshold. Raise β by teaching the lens better, so it spreads faster. Cut λ by refusing to forget, out loud and in numbers. Add σ by organizing, which can ignite awareness even where it would never catch on its own. That is the whole strategy, and it is the reason the work is teaching and remembering rather than fighting capital with capital.
The math is a map, not the country. The parameters here are illustrative, chosen to show the shape of the thing, not measured from a real case yet. But the shape is the point: enclosure is a product, so one collapsed step ends it; it is self-funding, so it accelerates; and against a public it forms a race with a threshold we can cross. Some things were never meant to be owned, and the field is still there, just under the fence, waiting for enough of us to see it at the same time.