Answer: In the aftermath of the war, internationally the world was changing, Europe was slicing up Africa, many countries started fighting for their independence, and the fight for influence and money ensued between the most powerful nations. During the time periods of 1865-1900, the US sought to keep up with Europe and expand its sphere of influence in the world under the leadership of Roosevelt, McKinley and other presidents.
Neolithic people developed systems of mathematics for reasons of travel for reasons of trade, for reasons of buying stuff from other people in general. Another reason was their natural curiosity which needed to be satisfied.
