Soter in the context of "Ptolemy I Soter"

Throughout the fifth century, Hellenistic-Eastern political systems, philosophies, and theocratic Christian concepts had gained power in the Greek-speaking Eastern Mediterranean due to the intervention of important religious figures there such as Eusebius of Caesarea (c. 260 – c. 339) and Origen of Alexandria (c. 185 – c. 253) who had been key to developing the constant Christianized worldview of late antiquity.

By the 6th century, such ideas had already influenced the definitive power of the monarch as the representative of God on earth and of his kingdom as an imitation of God's holy realm. The Byzantine Empire was a multi-ethnic monarchic theocracy adopting, following, and applying the Orthodox-Hellenistic political systems and philosophies. The monarch was the incarnation of the law—nomos empsychos—and his power was immeasurable and divine in origin insofar as he channeled God's divine grace, maintaining what is good. He was the ultimate benefactor, caretaker, and saviour of the people: Evergétis, Philanthrōpía, and Sōtēr, anointed with all power, upholding the divine laws since he ought to emulate Christ first (christomimetes) in all of his divine, pious, loving orthodox attributes to all by being his earthly presence.

Attalus I (Ancient Greek: Ἄτταλος 'Attalos'), surnamed Soter (Greek: Σωτήρ, 'Savior'; 269–197 BC), was the ruler of the Greek polis of Pergamon (modern-day Bergama, Turkey) and the larger Pergamene Kingdom from 241 BC to 197 BC. He was the adopted son of King Eumenes I, whom he succeeded, and the first of the Attalid dynasty to assume the title of king, sometime around 240 to 235 BC. He was the son of Attalus and his wife Antiochis.

Attalus won an important victory, the Battle of the Caecus River, over the Galatians, a group of migratory Celtic tribes from Thrace, who had been plundering and exacting tribute throughout most of Asia Minor for more than a generation. The victory was celebrated with a triumphal monument at Pergamon (The Dying Gaul) and Attalus taking the surname "Soter" and the title of king. He participated in the first and second Macedonian Wars against Philip V of Macedon as a loyal ally of the Roman Republic, although Pergamene participation was ultimately rather minor in these wars. He conducted numerous naval operations throughout the Aegean, gained the island of Aegina for Pergamon during the first war and Andros during the second, twice narrowly escaping capture at the hands of Philip V. During his reign, Pergamon also repeatedly struggled with the neighboring Seleucid Empire to the east, resulting in both successes and setbacks.

Ptolemy IX Soter II (Greek: Πτολεμαῖος Σωτήρ, Ptolemaĩos Sōtḗr 'Ptolemy the Saviour'), commonly nicknamed Lathyros (Λάθυρος, Láthuros 'chickpea'), was twice king of Ptolemaic Egypt. The son of Ptolemy VIII and Cleopatra III; he reigned as Ptolemy Philometor Soter in joint rule with his grandmother Cleopatra II and mother Cleopatra III from 116 to 107 BC, and then again as Ptolemy Soter from 88 to 81 BC. Ptolemy IX became the heir apparent after the murder of his half-brother Ptolemy Memphites in 130 BC, during a civil war between Ptolemy VIII and Cleopatra II. On his father's death in 116 BC, he became co-regent with Cleopatra II (until 115 BC) and with Cleopatra III. He eventually quarrelled with his mother and in 107 BC, she deposed him and replaced him with his younger brother, Ptolemy X. However, Ptolemy IX succeeded in seizing control of Cyprus. From there he invaded Judaea, but was prevented by Ptolemy X from invading Egypt (103–102 BC). In 88 BC, the Alexandrians expelled Ptolemy X and restored Ptolemy IX to the throne. He reigned alone until 81 BC, when he appointed his daughter Berenice III as co-regent shortly before his own death. She succeeded him as ruler.

Antiochus I Soter (Ancient Greek: Ἀντίοχος Σωτήρ, Antíochos Sōtér; "Antiochus the Savior"; c. 324/3 – 2 June 261 BC) was a Greek king of the Seleucid Empire. Antiochus succeeded his father Seleucus I Nicator in 281 BC and reigned during a period of instability which he mostly overcame until his death on 2 June 261 BC. He is the last known ruler to be attributed the ancient Mesopotamian title King of the Universe.

Menander I Soter (Ancient Greek: Μένανδρος Σωτήρ, romanized: Ménandros Sōtḗr, lit. 'Menander the Saviour'; Pali: Milinda), sometimes called Menander the Great, was an Indo-Greek king (reigned c. 165/155 –130 BC) who administered a large territory in the northwestern regions of the Indian subcontinent and Central Asia. Menander is noted for having become a patron of Greco-Buddhism and is regarded as the greatest and most well-known of the Indo-Greek kings.

Menander might have initially been a prince or king of Bactria. After conquering the Punjab, as far as Taxila and Sagala, he established an empire which stretched from the Kabul River in the west to the Ravi River in the east, and from the Swat River valley in the north to Arachosia (the Helmand Province). The Greek geographer Strabo wrote that he "conquered more tribes than Alexander the Great." Ancient Indian writers indicate that he possibly launched expeditions southward into Rajputana (Rajasthan, Gujarat and Sindh) and central India (Gujarat and Malwa) and as far east down the Ganges River Valley as Pataliputra (Patna).

The Battle of the Caecus River or Battle of the Kaikos was a battle between an army of the Kingdom of Pergamon commanded by Attalus I, and the Galatian tribes who resided in Anatolia (Asia Minor). The battle took place near the source of the Caecus River (Ancient Greek: Κάϊκος, romanized: Káïkos) and resulted in a victory for the Kingdom of Pergamon.

The exact date of the battle is unknown, but it seems to have taken place early in the reign of Attalus I. Attalus I celebrated it as a great victory and as establishing his legitimacy as ruler early in his reign, and used it as a reason to dub himself Soter, Savior, and to take the title of basileus, king. R. E. Allen suggests the early 230s (238 to 235 BC) as the best guess of the date.