Alfred Wegener<span> brought together several lines of </span>evidence<span> to support his theory of continental drift. One is quite simple -- that the continents look like they could "fit" together, much like puzzle pieces that have drifted apart.</span>
The Cold War, The Death Count (70 million), Also it shaped our world to develop Nukes!
America was hesitant to get involved in foreign affairs because they thought it would bring their country together.
Muhammad ibn Musa al-Khwarizmi
I dont quite know what you mean but a major thing that happened then was the start of the french revolution which kick started many other revolutions in south america, Haiti, brazil, and Mexico but America was contemplating whether or not to help the french.<span />