George Stephenson was the first inventor of the steam engine locomotive. He used the improvements of the steam engine itself, invented by James Watt, to make a better way of transportation. The purpose of this locomotive was make an easier way to transport and trade goods across the United States.
The steam road Locomotive was invented by Richard Trevithick, but the first steam RAILWAY Locomotive was invented by George Stephenson. A Scottish inventor called William Murdoch, made the first Locomotive Prototype. Hope this helps!
Britain was the main force in the invention and development of the steam engine and steam locomotives. The first steam locomotive to run in America, was imported from Britain, called the Stourbridge Lion.