Because there was a investment in industries other than agriculture
Yes, it is true that James Madison promised that the Bill of Rights would be added to the Constitution, since many people were afraid that without this Bill of Rights the Constitution would trample of people's individual liberties.
Answer: He created the Centers for Disease Control to study the disease.
The 1920 United States census recorded that 51.2% of the population was living in urban areas. Since the census is taken only every ten years, we don't really have great data for the years in between, so 1920 is the closest we have to a year where the urban/rural split was roughly 50/50.
