Answer:
After surviving battle after fierce battle, Alexander the Great died in June 323 B.C. at age 32. Some historians say Alexander died of malaria or other natural causes; others believe he was poisoned. Either way, he never named a successor.:
It would be "party leadership" that is the most common party system in the world today, although it should be noted that there are still many unitary and dictatorship-based governments.
I would guess the Mediterranean Sea.
