The Hellenistic period of Greek and Middle-Eastern history is not a popular one, Randall Collins says, because there are no heroes to simplify our memory, and above all because it is too complicated:
Alexander’s conquest did not change the pattern of succession crises. As soon as he died, at least 10 contenders came forward to take control of the Empire, including the older generals Alexander inherited from Philip, plus his own important commanders. This produced a volatile situation of multisided conflict that took over 20 years to settle down.
The first three years after Alexander’s death were a shifting kaleidoscope of alliances, side-switches, and deals. The senior commander of the infantry phalanx proposed as successor Alexander’s half-brother, a feeble-minded illegitimate son of Philip (under his guardianship, of course); rivals proposed Alexander’s infant son by Roxane. Perdiccus, the senior cavalry commander, proposed as a compromise that both should rule jointly, then had the phalanx commander murdered, leaving himself as sole guardian. Perdiccus then alienated Antipater, the Macedonian viceroy, by jilting his daughter to marry Alexander’s sister Cleopatra.* Perdiccus in turn was betrayed by his own troops to Antigonus, a one-eyed general whose lineage would eventually get the Macedonian part of the empire. It wasn’t just family members who killed each other in this atmosphere of betrayal.
*Not the famous Cleopatra who ruled Egypt 51–30 BC, had affairs with both Julius Caesar and Mark Anthony, and ordered the murder of her own brother Ptolemy, her adolescent co-ruler. Cleopatra and Ptolemy were both popular Macedonian names.
Eventually the 10 contenders winnowed down to 4 or 5. After the initial free-for-all, the strongest concentrated on hunting down and eliminating Philip and Alexander’s relatives, all the contenders and pretenders. Alexander’s son by Roxane, who should have been the legitimate heir, was killed at age 13. The Empire began to settle into a pattern of 3 states: Egypt; an Asian state in the heart of the old Persian Empire (Iran, Mesopotamia, Syria); and Macedon/Asia Minor. But they kept trying to take each other’s territory — general Ptolemy in Egypt for instance used his fleet to control the Greek cities around the Aegean Sea — and wars and betrayals kept on happening. In Macedon, a surviving son of the monarchy, now called Philip III, was manipulated by his wife into allying with the son of the viceroy Antipater; they were opposed by Alexander’s mother, Queen Olympias, who engineered the death of yet another of her stepsons, until she herself was executed.
Forty years after Alexander’s death all his relatives were dead, but the sons and daughters of his generals were still at it. The current ruler of Macedon, Lysimachus, was persuaded by his third wife, Arsinoe, to put his own son to death, in favor of her own children. Lysandra, the widow of the slain man, allied with her brother Ptolemy II and the Asian forces of Seleucus to invade Macedon and kill Lysimachus; at which point Ptolemy II had his ally killed so as not to share the spoils with him. And this was another sibling quarrel, since Arsinoe, Lysandra and Ptolemy II were all half-brothers and half-sisters, all children of the many wives of Ptolemy I. It was a chain of revenges and murderous ambitions such as the Greek dramatists described as divine powers of the Furies, or Nemesis.