Many Europeans had experienced the tyranny of monarchies in their own countries. The Patriots' war against George III inspired them. Lafayette and Pulaski may have also been moved by the ideas in the declaration of Independence. I hope this helps you
It improved New Yorks economy and was the second longest canal at the time it was built
Europe would be in contact with lost knowledge sooner that in reality happened. As the arab nations were more civilized than some others, the cities were preserved and the really important work of the romans would be preserved and enhanced. The gods statues were destroyed and Islam would be the only religion.
President Richard Nixon supported the policy of détente as a way to reduce tensions between the United States and the Soviet Union