Answer:
steam locomotive was the fastest mode of transportation. therefore it also was spread the fastest. In half a century it spread to almost all of US.
Explanation:
steam boats and canal system transportation were slow moving. the idea of a flat rail road was derived by horse drawn carts. All in all, without a doubt, steam locomotive has had the greatest long term impact on American economy ( even if several inventions and improvisations had to be made through ).
-18,038 would be your answer.
If European states were organized along national lines, then the states would work together and that would create a peaceful Europe. But they were wrong..
A completely new European civilization never really did develop. The Roman Empire didn't just fall off the face of the earth. It directly evolved into what came after. ... they are converted to christianity
