What didn't change between 1750 to 1900?

Where was the most important civil war battle fought in missouri? Was the US justified in not granting immediate independence to the Philippines? Who was the Roman ruler held the title of dictator or absolute ruler at the time of his assassination by members of the Senate? What would have happened if the Spanish won the Spanish American War? Where federalists who opposed the war of 1812 organized? What happened at the korematsu trial? How might Soviets have viewed American segregation laws in the American South? Why did the create the settlement of Jamestown? When was Devin Hester drafted by the Bears? Which commanding officer has Field Marshall Blindfold Attack Minions? At what age will cradle cap resolve if left untreated? In 1905 Russia how did the Jewish men wear their hair? What impact did the Europeans have on Algonquins? Where and when was the American Revolutionary War started? How many red states are there? Who won the Super Bowl in 2010? When you cannot see what is taking place but other senses indicate occurrences this is called? How did Constantine the great come to power? What is the wheel span of a biplane? How many home runs by a switch hitter in one game?

What didn't change between 1750 to 1900?