The correct answer is:
Texas and California were only sparsely populated before the 1820s.
I believe some things that the U.S. had that made it ripe for rapid industrialization was the resources. The United States had fertile land, ocean access, rich mineral resources, forests, railroads.
Adam Smith wrote the book
The answer is Galileo, however, a scientist much earlier then Galaleo, named Anaxagoras also discover this. However, I believe credit is given to Galileo.
