Wars of the Diadochi - Wars to resurrect Alexander's Empire

Feb 2019

Perdiccas and Antigonus were very close to reunite the Alexandrine Empire

When Eumenes was victorious in Asia Minor , Perdiccas was murdered by own associates after failure to cross the Niles
When Antogonus was annexing Caria , his son , Demetrius was defeated at Battle of Gaza and Seleucus robbed him of the Babylon and eastern satrapies .
Soon after Seleucus defeated Lysimachus , he was assassinated . ( However , at the age of 77 , his hunger for further wars and expansion were doubtful )

Unexpected turns of events and shifting alliances to prevent anyone to emerge being supreme led to the failure of Diadochi to resurrect the Empire .
After all , they were all such capable generals and statemen that everyone of them had the ambition of succeeding Alexander and continue his legacy .
However none was first among equals themselves after Alexander the Great .
Nov 2011
The Bluff
The was no need to re-unite Alexander's empire during Perdikkas' regency; the empire was whole. In Babylon Perdikkas became regent of the empire. Matters only fell apart on the altar of Perdikkas' ambition. The closest the empire came to be re-united was under Seleukos after Koropedion. Had he not been murdered, Seleukos will have united all the empire aside from Egypt. He will have dealt with that too for, as he said to Ptolemy after Ipsos he "would consider later how best to deal with friends who chose to encroach". Ptolemy had, of course, annexed Koile-Syria while the campaign of Ipsos was taking place.

The Peace of the Dynasts (311) specifically excluded Seleukos who, with Ptolemy's help, had liberated Babylon from Antigonos. Antigonos very deliberately excluded the one time hypaspist commander and, in so doing, sewed the seeds of his own downfall.
Nov 2008
We cannot be sure what Seleucus intended to do about Egypt. After the battle of Corupedium, Seleucus intended to rule Macedonia as a personal fief, leaving Thrace to be ruled by the children of murdered Agathocles. Seleucus may have intended to install in Egypt Ptolemy Ceraunus as a client king, contenting himself with the acquisition of Cyprus and Coele-Syria, including Palestine.