Answer:
The distinct differences in the political systems of the two countries often prevented them from reaching a mutual understanding on key policy issues and even, as in case of the Cuban missile crisis, brought them to the brink of war.
By the end of WWI over 8.5 million soldiers had died on all sides of the conflict. There were also over 22 million casualties as a result of the world. The "Great War" is remembered as one of the most deadly wars in human history and still to this day is remembered across the world for its mass carnage as a result of war.
Answer:
It differed in that the sun was at the center of the universe/solar system.
Roads canals and railroads helped move people west because then supplies could get to people living in the west
The journey to Mecca each Muslim is expected to take is called the Hajj, which is Arabic for pilgrimage. Hope this helped :)
