The biggest one is speculation on the market. Many would buy stocks on margin, say only meeding 10% of the share amount to buy a share of stock. So great quantities of stock were able to be bought without necesarily having the money to legitimately purchase them.
Answer:
Alexander the Great's conquests freed the West from the menace of Persian rule and spread Greek civilization and culture into Asia and Egypt. His vast empire stretched east into India.
Answer: Ancient Athenians served as a model for Western societies because they believed in (and also created) democracy.