It's weird that no one thinks to build an Iron Dome until well after the nuclear arms race has been chugging along for a while. The goal should be to checkmate

It's weird that no one thinks to build an Iron Dome until well after the nuclear arms race has been chugging along for a while. The goal should be to checkmate potentially ruinous branches of a tech tree, not to be in perpetual check with them as they grow ever longer and spikier.