Ah, but Amendments that gave women the right to vote and gave African Americans equal rights were not changes in human nature. They were an re-affirmation of God's Law, which is what our Constitution is based upon.
The proliferation of clocks did not change the work day for many American workers. Farmers, loggers, miners, etc. still worked sunup to sundown. And most modern sports came about as a result of economics. Gambling, to be exact. It was another way for people to make money.