And since it was cheap that meant you could have steel wherever you wanted it: steel for ploughs, for engines, for the skeletons of buildings and, for that matter, the nails attaching them to each other. Here we run smack bang into the same lesson we learned from concrete: what makes steel a mainstay of the Material World? Not merely that it is very good at doing what it does, but that it is both very good and very cheap.
