Answer: more than 10,000 were killed or injured.
Explanation: American Civil War.
Answer:
Parliament, desiring revenue from its North American colonies, passed the first law specifically aimed at raising colonial money for the Crown. The act increased duties on non-British goods shipped to the colonies.
With the rise of a Nuclear Soviet State, the United States was auditing it's own internal defense capabilities.
One critical point was the size of the United States and the time it could take to move forces from one point to another in times of war and emergency.
Even within the United States, there was a rise in communist parties which were slowly becoming a threat.
The Interstate highway act not only produced economic benefits to stop the rise of communism in the United States, but also provided nation-wide infrastructure to smoothly and quickly move forces across the country.
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I would have to say the answer is Patriotism
The indoor electric lap which was invented during the second industrial revolution (which you've mentioned) enabled people to be awake much longer at a good light source, they were able to read, to communicate or to do anything they desired. This of course had a dramatic affect how people were socializing at night :)
