The new world builds an inter dependent global economic system by each continent relied on the other continents to thrive. For example, are europe, africa and america in new system which: Europe played a distinctive role in markets, capital, and technology. Africa played a distinctive role in labor and america played a distinctive role in raw materials which includes metal and soil for sugar cane.
The cultural change that resulted from an eight hour workday was that leisure times was "invented" people suddenly had more time as they were able to work for only 8 hours, they could spend other time doing other things.
States will often pass a law and then other states will follow when public policy is created at national leveled, states follows it. Example: 1964 Voting Rights Act