Ptolemy I Soter

Successor of Alexander

When Alexander died in 323 BC, Ptolemy is said to have instigated the settlement of the empire made at Babylon. Through the Partition of Babylon, he was appointed satrap of Egypt, under the nominal kings Philip III and the infant Alexander IV; the former satrap, the Greek Cleomenes, stayed on as his deputy. Ptolemy quickly moved, without authorization, to subjugate Cyrenaica.

By custom, kings in Macedonia asserted their right to the throne by burying their predecessor. Probably because he wanted to pre-empt Perdiccas, the imperial regent, from staking his claim in this way, Ptolemy took great pains in acquiring the body of Alexander the Great. On his deathbed, Alexander wished to be buried at the Temple of Zeus Ammon in the Siwa Oasis of ancient Libya instead of the royal tombs of Aigai in Macedon. However, his successors including Perdiccas attempted to bury his body in Macedon instead. In late 322 or early 321 BC, Alexander's body was in Syria, on its way to Macedon, when it was captured by Ptolemy I. He brought Alexander's remains back to Egypt, interring them at Memphis, but they were later moved to Alexandria where a tomb was constructed for them. Shortly after this event, Ptolemy openly joined the coalition against Perdiccas. Perdiccas appears to have suspected Ptolemy of aiming for the throne himself, and may have decided that Ptolemy was his most dangerous rival. Ptolemy executed Cleomenes for spying on behalf of Perdiccas; this removed the chief check on his authority, and allowed Ptolemy to obtain the huge sum that Cleomenes had accumulated.

Rivalry and wars

In 321 BC, Perdiccas attempted to invade Egypt, only to fall at the hands of his own men. Ptolemy's decision to defend the Nile against Perdiccas ended in fiasco for Perdiccas, with the loss of 2,000 men. This failure was a fatal blow to Perdiccas' reputation, and he was murdered in his tent by two of his subordinates. Ptolemy immediately crossed the Nile, to provide supplies to what had the day before been an enemy army. Ptolemy was offered the regency in place of Perdiccas, but he declined. Ptolemy was consistent in his policy of securing a power base, while never succumbing to the temptation of risking all to succeed Alexander.

In the long wars that followed between the different Diadochi, Ptolemy's first goal was to hold Egypt securely, and his second was to secure control in the outlying areas: Cyrenaica and Cyprus, as well as Syria, including the province of Judea. His first occupation of Syria was in 318, and he established at the same time a protectorate over the petty kings of Cyprus. When Antigonus I, master of Asia in 315, showed expansionist ambitions, Ptolemy joined the coalition against him, and on the outbreak of war, evacuated Syria. In Cyprus, he fought the partisans of Antigonus, and re-conquered the island (313). A revolt in Cyrene was crushed the same year.

In 312, Ptolemy and Seleucus, the fugitive satrap of Babylonia, both invaded Syria, and defeated Demetrius I, the son of Antigonus, in the Battle of Gaza. Again he occupied Syria, and again—after only a few months, when Demetrius had won a battle over his general, and Antigonus entered Syria in force—he evacuated it. In 311, a peace was concluded between the combatants. Soon after this, the surviving 13-year-old king, Alexander IV, was murdered in Macedonia on the orders of Cassander, leaving the satrap of Egypt absolutely his own master.

The peace did not last long, early in 310 he was informed that his ally Nicocles of Paphos was planning to defect to Antigonus; he sent some agents, who together with his brother Menelaus, who was still on Cyprus with an army, dealt with the situation, they surrounded Nicocles palace and forced him to commit suicide. In 309 Ptolemy personally commanded a fleet which detached the coastal towns of Phaselis, Xanthos, Kaunos, Iasos and Myndus in Lycia and Caria from Antigonus, then crossed into Greece, where he took possession of Corinth, Sicyon and Megara (308 BC). In 306, a great fleet under Demetrius attacked Cyprus, and Ptolemy's brother Menelaus was defeated and captured in another decisive Battle of Salamis. Ptolemy's complete loss of Cyprus followed.

The satraps Antigonus and Demetrius now each assumed the title of king; Ptolemy, as well as Cassander, Lysimachus and Seleucus I Nicator, responded by doing the same. In the winter of 306 BC, Antigonus tried to follow up his victory in Cyprus by invading Egypt; but Ptolemy was strongest there, and successfully held the frontier against him. Ptolemy led no further overseas expeditions against Antigonus. However, he did send great assistance to Rhodes when it was besieged by Demetrius (305/304). The Rhodians granted divine honors to Ptolemy as a result of the lifting of the siege.

When the coalition against Antigonus was renewed in 302, Ptolemy joined it, and invaded Syria a third time, while Antigonus was engaged with Lysimachus in Asia Minor. On hearing a report that Antigonus had won a decisive victory there, he once again evacuated Syria. But when the news came that Antigonus had been defeated and slain by Lysimachus and Seleucus at the Battle of Ipsus in 301, he occupied Syria a fourth time.

The other members of the coalition had assigned all Syria to Seleucus, after what they regarded as Ptolemy's desertion, and for the next hundred years, the question of the ownership of southern Syria (i.e., Judea) produced recurring warfare between the Seleucid and Ptolemaic dynasties. Henceforth, Ptolemy seems to have involved himself as little as possible in the rivalries between Asia Minor and Greece; he lost what he held in Greece, but reconquered Cyprus in 295/294. Cyrenaica, after a series of rebellions, was finally subjugated in about 300 and placed under his stepson Magas.

Marriages, children, and succession

While Alexander was alive, Ptolemy had three children with his mistress Thaïs, who may also have been his wife: Lagus; Leontiscus; and Eirene, who was given in marriage to Eunostos of Soloi in Cyprus. During the Susa weddings, Ptolemy married Persian noblewoman Artakama, as ordered by Alexander the Great. Around 322 BC, he married Eurydice, daughter of Antipater, regent of Macedonia. They had five children before she was repudiated: three sons–Ptolemy Ceraunus, king of Macedon from 281 BC to 279 BC; his brother and successor Meleager, who ruled for two months in 279 BC; and a 'rebel in Cyprus' who was put to death by his half-brother Ptolemy II—as well as the daughters Ptolemais, who married Demetrius I of Macedon, and Lysandra, first married to Alexander V of Macedon and after to Lysimachus' son Agathocles. Ptolemy married once more to Berenice, Eurydice's cousin, who had come to Egypt as Eurydice's lady-in-waiting with the children from her first marriage to Philip. Their children were Arsinoe II, Philotera, and Ptolemy II. Their eldest child Arsinoe married Lysimachus, then her half-brother Ptolemy Keraunos, and finally her full brother Ptolemy II.

In 285, Ptolemy made his son Ptolemy II his co-regent. His eldest legitimate son, Ptolemy Keraunos, fled to the court of Lysimachus. Ptolemy I died in January 282 aged 84 or 85. Shrewd and cautious, he had a compact and well-ordered realm to show at the end of forty years of war. His reputation for good nature and liberality attached the floating soldier-class of Macedonians and other Greeks to his service, and was not insignificant; nor did he wholly neglect conciliation of the natives. He was a ready patron of letters, founding the Great Library of Alexandria. The Ptolemaic dynasty which he founded ruled Egypt for nearly three hundred years. It was a Hellenistic kingdom known for its capital Alexandria, which became a center of Greek culture. Ptolemaic rule ended with the death of Cleopatra VII in 30 BC.

Economic reforms

The Ptolemaic economy consisted of two ancient economic systems, linked by a bureaucratic hierarchy, but also by increased market activity, which was stimulated by the minting of coins and the formation of a state-controlled fiscal policy. The main sources of income were based on the cultivation of grain and the proceeds from the circulation of money, from its own trade, as well as tax revenues from the movement of goods. Another element of economic development was the ability to transport in the Mediterranean region, where the port of Alexandria played a dominant role.

The Ptolemies directly owned almost half of Egypt's agricultural land, and Egyptian exports of grain, linen, and other goods helped finance the expansion of the empire. The population is estimated to have been about 3 million, and anyone who produced cloth, papyrus, or beer also had to comply with strict government controls and pay taxes on their sales. One advantage of all these processes was that the government could pay for improvements to the system and strengthen the economy. This included irrigation projects that expanded agricultural land. In practice, Egypt was divided into administrative provinces called nomes. At the nome level, officials dealt with municipal and village authorities to resolve economic issues such as land administration, taxation, and currency circulation. The Macedonians and Greeks who owned the land and traded its proceeds did not work the land themselves the tenant farmers were mostly local Egyptians.

The evolving fiscal policy was based on reforms in the circulation of monetary units—coins—minted from precious metals (gold, silver, copper) as early as the 5th–4th centuries BC (for example, under Pharaoh Nectanebo II of the 30th Dynasty). At the time of Alexander's conquest of Egypt, the Egyptian economy was in the early stages of monetisation. The main coin was the Athenian silver tetradrachm, called the owl which served as international currency in Egypt and the Levant in the 5th and 4th centuries BC. The owls circulating in Egypt included coins from the Athenian mint, as well as imitations minted locally, in the Nile Delta and around Memphis, but also in more distant areas such as the island of Elephantine and the oasis of Kharga.

Ptolemy Soter, after consolidating his position as satrap, around 310–311 BC, transformed Egypt into a closed monetary zone, which necessitated the exchange of foreign currencies at all points of entry into Egypt. This provided a new source of revenue for the state. Resources of gold and copper were relatively abundant, but silver, the standard of Hellenistic currency, was always scarce in Egypt and had to be imported. To cope with the limited supply of silver, Ptolemy Soter reduced the silver and gold drachmas to 80% of their original weight by 305 BC. The standard of Ptolemaic currency as a whole was then frequently changed, especially when later rulers devalued the currency by reducing its precious metal content to finance their wars or cope with economic hardship. Around 299 BC, Ptolemy I Soter replaced the older gold stater of Alexander with his own image on the obverse, with coins whose weight was adjusted to the standard 14.25 g.

This not only distinguished Egypt from other territories, but also, perhaps more importantly, allowed Ptolemy to expand his currency supply to keep up with the growth of military and judicial spending. Aspects of these later reforms included the creation of fiscal institutions that increased state revenues, and most notably a closed monetary zone with mandatory exchange of other coins at the borders. Around 294 BC a commission was tasked with exchanging gold for silver. The history of his monetary reforms shows him to have been an unusually energetic and capable ruler, as a result of which, together with his military successes, he was recognised as the legitimate pharaoh of Egypt.

Work as a historian

Ptolemy himself wrote an eyewitness history of Alexander's campaigns (now lost). In the second century AD, Ptolemy's history was used by Arrian of Nicomedia as one of his two main primary sources (alongside the history of Aristobulus of Cassandreia) for his own extant Anabasis of Alexander, and hence large parts of Ptolemy's history can be assumed to survive in paraphrase or précis in Arrian's work. Arrian cites Ptolemy by name on only a few occasions, but it is likely that large stretches of Arrian's Anabasis reflect Ptolemy's version of events. Arrian once names Ptolemy as the author "whom I chiefly follow", and in his Preface writes that Ptolemy seemed to him to be a particularly trustworthy source, "not only because he was present with Alexander on campaign, but also because he was himself a king, and hence lying would be more dishonourable for him than for anyone else".

Ptolemy's lost history was long considered an objective work, distinguished by its straightforward honesty and sobriety, but more recent work has called this assessment into question. R. M. Errington argued that Ptolemy's history was characterised by persistent bias and self-aggrandisement, and by systematic blackening of the reputation of Perdiccas, one of Ptolemy's chief dynastic rivals after Alexander's death. For example, Arrian's account of the fall of Thebes in 335 BC (Anabasis 1.8.1–1.8.8, a rare section of narrative explicitly attributed to Ptolemy by Arrian) shows several significant variations from the parallel account preserved in Diodorus Siculus (17.11–12), most notably in attributing a distinctly unheroic role in proceedings to Perdiccas. More recently, J. Roisman has argued that the case for Ptolemy's blackening of Perdiccas and others has been much exaggerated.

Relationship with Euclid

Ptolemy personally sponsored the great mathematician Euclid. He found Euclid's seminal work, the Elements, too difficult to study, so he asked if there were an easier way to master it. According to Proclus, Euclid famously quipped: "Sire, there is no Royal Road to geometry."

In modern culture

• Ptolemaida, a town in Greece, was renamed in 1927 in honor of Ptolemy and his daughter Ptolemais. It is the primary town of Eordaia, where Ptolemy's ancestry originated and where he was born.
• Ptolemy is portrayed by Anthony Hopkins and Elliot Cowan as the narrator and a main character in the historical epic Alexander, directed by Oliver Stone.
• Ptolemy appears as a minor character in Mary Renault's Alexander Trilogy novels.
• Ptolemy appears as a character in the mobile game Fate Grand Order as an Archer Class Servant.
• Ptolemy is portrayed by Dino Kelly as a recurring character in Netflix's 2024 drama docuseries Alexander: The Making of a God.