THE AUTOMOBILE, far & away had the biggest impact of all time!
It was a global phenominon (sorry for the spelling) that's still going on today. It impacted on our society on many, many, fronts.
It impacted on the steel industry, the oil industry, commercial farming as well as private farming, road construction, the hotel
and motel busineses, tourism, even the fast food business. The list goes on and on, longer than I have the time to post on this
topic. That machine provided millions and millions of jobs for a lot of people.