The Grid We Share Is Worth More Than the Reactor in the Basement

There is a warm room in Tromsø this month, and I do not begrudge it. Compact fusion that lets a single cooperative make its own baseload is a real advance, and after the brownouts of August only a scold would tell those neighbors to be colder for the sake of a principle. But principles are what a shared grid is made of. Every block that installs its own core and stops drawing from the common line takes with it not just its load but its stake — its reason to care whether the wider grid, still carrying close to a third of the world on fusion, stays solvent for the households that cannot afford a reactor of their own. We have seen this shape before, in water and in shelter: the able secede quietly, and the commons they leave behind grows both poorer and more fragile precisely when it can least afford to. The answer is not to forbid the basement reactor. It is to price the exit honestly — to ask those who unplug to keep paying into the wire that still holds up their neighbors. A cooperative can own its heat. It cannot own its way out of the community.