The reason they went to war is when the Athens interfered in Persian affairs.
Due to the flaws on Electoral College, there will always be a possibility that the winner of the popular vote may not win the presidency. This has already occurred four times and the most recent in 2000. This is because of the winner take all factor which means that any votes won by the loser of the popular vote are not replicated in the electoral vote. Like in 2008, Barack Obama won only in the 51 percent of the popular vote in Ohio but still, he won all of Ohio's electoral votes even though most of the Ohioans voted for John McCain.
I believe it was the division of Byzantium and the Latin West. Byzantium was the emperor of Constantinople the area around Greece and Turkey and North into Russia. Latin West was under the control of different people until dominance of the Franks in the region. Another powerful and well noted authority was the Pope. Basically...there was a the decline of Rome and different views on the Christian doctrine. (Q_Q ) That's the best way I can word it.
Most colonies lacked human labor, therefore, they used slaves to work on plantations in the new found colonies.
