Is the nuclear bomb responsible for the American middle-class

A lot of ppl say the key to wealth is real property: the threat of nuclear annihilation force ppl to spread along a 2D plane over a 3D blast (remind us of something). For purposes of convenience, ownership was better in a house type. It wasn't the car (or was it)? Think about it. Ford made cars in the 20s and we didn't grow as much suburbs as we do now. The energies of preservation overcame other inertias.