Why did the empire collapse after the death of Alexander the Great?

Alexander the Great is a unique person in history. He managed to capture huge territories, such a large Empire never existed. Alexander the Great is the best conqueror, but he was not an organizer, he did not know how to govern the country, especially since it was too huge for those times – there was no communication system between distant borders.

Alexander the Great died at the age of 33 without leaving a will, and his son and wife were soon killed by envious people. He had no heirs left, and those close to him began to share trophies, land, power.