First of all... what period? because if you are talking about this time, I think it is becaise they want to feel powerful to be able to have more allied countries in any situation, they also do it because they want to control most of the world natural sources that other countries have.
Stephen A. Douglas (1813-1861) was a U.S. politician, leader of the Democratic Party
The two years prior to World War I in the region of the Balkans saw the rising of Serbian nationalistic Groups. Later came the assassination of the Archduke Ferdinand in the Balkan City of Sarajevo, main cause of the war.
Answer:
The characteristics that pulled the Greek city states together were the poetry of Homer and the food growth and preparation.
