The Political Reality Behind a Theological Phrase

Read the phrase Son of God today and your mind probably goes straight to theology, the second person of the Trinity, Christ’s unique relationship to the Father, centuries of councils working out what it means for one being to share a divine nature with another. In the first-century Mediterranean world, the phrase carried a different meaning, one so recognizable that any inhabitant of the Roman Empire would have understood it on the spot, and none of it had anything to do with metaphysics.

We all know Julius Caesar was assassinated on the Ides of March in 44 BCE. The Roman Senate moved to deify him, and he became Divus Julius, the Divine Julius. His adopted son Octavian, who would later take the name Augustus, turned that deification into a political tool with real skill. He began calling himself Divi Filius, Son of the Deified One, a title he stamped on coins circulating across the empire: DIVI F. The message wasn’t subtle: I have the right to rule because I am the son of a god, and my authority comes from my father’s divine status. Octavian used that claim to consolidate power, eliminate rivals, and become Rome’s first emperor. By the time he took the name Augustus in 27 BCE, he’d become something close to divine himself. The Priene Calendar Inscription, carved in Asia Minor around 9 BCE, shows how the language worked out in the provinces: the birthday of the god Augustus was the beginning of the good news for the world that came because of him. The Greek word behind good news is euangelion, the exact term the Gospel writers later use for their own message about Jesus. Augustus gets called savior in that inscription, and not as a figure of speech. It’s a political title for the man who brought peace and prosperity through divine authority.

Every emperor after him inherited the same vocabulary. Tiberius, who ruled during Jesus’s adult life, carried the official title Son of the Divine Augustus. Caligula, Claudius, and Nero each claimed descent from gods or divinity of their own. Suetonius records Vespasian joking on his deathbed,

“Dear me, I think I’m becoming a god” (Lives of the Caesars 23.4).

The joke landed because everyone already knew the mechanism behind it. Emperors became gods after death, and their sons carried the title son of a god while they were still alive.

None of this ran on ceremony alone. It held up imperial legitimacy from underneath. A son of god ruled by right of divine parentage, inheriting sacred authority right alongside political power, and resisting him meant defying the gods who’d sanctioned his rule in the first place. Roman civic religion reinforced the whole arrangement in every province, incense burned before the emperor’s genius, oaths sworn in his name, festivals marking his birthday and his accession to the throne. Refusing any of that marked a person as politically suspect, maybe even seditious, the way refusing to stand for a national anthem gets read today as a statement whether or not you meant it as one.

So when the Gospel writers call Jesus Son of God, readers living inside that world wouldn’t have jumped to speculation about dual natures or trinitarian relationships. They’d have heard a political claim, a direct challenge to Roman authority, a declaration that this particular Jesus held legitimate rule through divine parentage. If the Radical really was the son of Herod the Great, as the Herodian Secret theory proposes, the title stops being metaphor entirely and becomes a legal and political designation instead.

Herod the Great had been appointed King of the Jews by the Roman Senate back in 40 BCE. Josephus records the whole episode in Antiquities 14.381-385: Herod traveled to Rome with backing from Mark Antony and Octavian, the Senate passed its decree, priests offered sacrifices, and Herod climbed the Capitoline to deposit the decree in the temple there. His kingship came from Roman political authorization, not from any Jewish religious anointing. His kingdom stood as a client state, but inside Judea he ruled with all the authority Rome’s divine mandate handed him.

A son of Herod would therefore carry a double claim to legitimacy. Through his father he held the throne of Judea by Roman appointment. Through his Davidic ancestry, since Herod had married Mariamne, a Hasmonean princess carrying Jewish royal blood, he could also claim descent from Israel’s greatest king. Put those two together and you get a man who counts as son of god in both the imperial Roman sense, heir to a king Rome itself had appointed, and in the Jewish messianic sense, heir to David’s throne and its promise of eternal rule under the God of Israel.

When the centurion at the cross looks at the dying Jesus and says, truly this man was the Son of God (Mark 15:39), Christian tradition reads that as the first Gentile recognizing who Jesus really was in some cosmic sense. Set inside its actual context, a Roman centurion watching a man die under a sign reading King of the Jews might be making a very different kind of observation. The condemned man had claimed to be son of the king, claimed a divine right to rule, and Rome had just shown the crowd exactly what happens to that kind of claim. The centurion’s line could be real recognition of royal blood just as easily as it could be a soldier’s bitter joke about pretensions crushed by superior force, and the text alone doesn’t tell us which.

The early Christian movement was operating inside a world already saturated with this language applied to emperors. Calling Jesus Son of God took imperial terminology already in daily use and pointed it somewhere else entirely, rather than inventing new religious vocabulary out of nothing, a declaration that someone other than Caesar held ultimate authority, that divine legitimacy belonged to Israel’s executed messiah rather than to Rome’s emperor.

Paul’s letters, written before any of the Gospels reached their final form, use the title with all that political weight still visible on the surface. Romans 1:1-4 has him introducing himself as a servant of Christ Jesus, called to be an apostle, set apart for the gospel of God, promised beforehand through the prophets in the holy Scriptures, concerning his Son, who was descended from David according to the flesh and was declared to be the Son of God in power according to the Spirit of holiness by his resurrection from the dead, Jesus Christ our Lord. Descended from David names Jewish royal lineage outright. Declared Son of God in power names political authority. Jesus Christ our Lord borrows titles that belonged, until that point, to Caesar alone.

What happened to Christians who kept insisting on this title tells you how much political weight it still carried decades later. Pliny the Younger, governing Bithynia in the early second century, wrote to Emperor Trajan asking what to do about the Christians turning up in his province (Epistles 10.96). He describes interrogating the accused, demanding they recant under threat of punishment, and executing the ones who refuse. The crime, as Pliny frames it, is political through and through: declining to offer incense to the emperor’s image, refusing to acknowledge Caesar as divine. From Rome’s side of the table, calling Jesus Lord and Son of God was a seditious claim about where legitimate authority actually resided, not some unusual religious opinion floating free of consequence.

Jewish usage of son of god language raises a different problem, and it deserves a moment of its own rather than a quick pass. Strict monotheism resisted handing divine paternity to any human being. The Hebrew Bible calls Israel collectively God’s son (Exodus 4:22) and calls the Davidic king God’s adopted son (Psalm 2:7), but always as metaphor, marking a special relationship rather than literal divine generation. A first-century Jew calling someone son of god would normally need to explain himself, since the phrase cut against standard theological categories. But if the Jews using this title about Jesus were making a political claim about royal succession rather than a theological claim about divine nature, no explanation is required at all. They’re using the same language Rome used and meaning roughly the same thing by it: this man is the son of the king and therefore holds legitimate authority to rule. If the king in question is Herod, appointed by Rome and recognized by the Senate, calling his son son of god borrows imperial vocabulary to describe a distinctly Jewish royal reality underneath it.

The trial before the Sanhedrin makes the political reading hard to avoid. The high priest asks, are you the Christ, the Son of the Blessed? (Mark 14:61). Christ is a political title. Son of the Blessed is a circumlocution for son of god, using the Blessed to sidestep direct invocation of the divine name. The question underneath the question is about royal authority: is this man claiming a kingship that would threaten the existing order? Jesus answers,

I am, and you will see the Son of Man seated at the right hand of Power, and coming with the clouds of heaven (Mark 14:62).

He confirms the claim and then raises the stakes on it, asserting not just royal heirship but divine authority backed at the highest level there is.

The high priest tears his robes and calls the claim blasphemy deserving death. The blasphemy here is asserting royal and judicial power without authorization from Temple authorities or Roman approval. If Jesus really was Herod’s son, holding a legitimate claim to the throne through Roman appointment and Davidic descent both, the charge of blasphemy stops being about factual accuracy and becomes entirely about institutional power instead. The bloodline is real. The authorization from the institutions controlling access to the throne simply isn’t there, and the claim, grounded in actual lineage as it may be, counts as illegitimate by their reckoning and has to be put down.

When Jesus is brought before Pilate, the charge gets translated straight into Roman political terms: we found this man misleading our nation and forbidding us to give tribute to Caesar, and saying that he himself is Christ, a king (Luke 23:2). Christ gets glossed immediately as a king. The accusation is sedition, a man claiming royal authority inside a Roman province. Pilate’s question, are you the King of the Jews? (Mark 15:2), isn’t asking about self-perception. It’s asking about factual status. If Jesus is Herod’s son, the answer is yes, by blood, by his father’s Roman appointment, and by Davidic descent through his mother’s Hasmonean line. The answer Jesus gives, you have said so, reads as neither confirmation nor denial, more like the only response available to a man whose political identity is both entirely true and lethal to state out loud.

The sign Pilate places above the cross reads Jesus of Nazareth, the King of the Jews, in Hebrew, Latin, and Greek (John 19:19-20). The chief priests want it changed to this man said, I am King of the Jews, marking the claim as false rather than true. Pilate refuses to change it. Whether he actually knows the truth about Jesus’s parentage or is simply asserting Rome’s authority to define and execute its own political criminals, the man dies under a description of his political identity rather than a vague charge. The sign states exactly what the title son of god stated everywhere else across the empire: this man claimed authority that came down to him from his father.

By the time of Nicaea in 325 CE, Son of God had been completely reworked through Greek philosophical categories. Jesus was now Son of God in the metaphysical sense, sharing divine essence, eternally begotten, of one substance with the Father. That development mattered enormously for the history of Christian doctrine, but it also marked a real departure from what the phrase meant when the Gospels were first written and first read aloud to a congregation. Ancient readers didn’t need councils and creeds to explain the title to them. It circulated daily on coins, in imperial proclamations, in the civic rituals structuring public life from one end of the empire to the other. When the same language turned up in Jewish texts about a crucified messiah, people heard a political challenge wearing familiar clothes, a claim that this Jesus was being presented as legitimate ruler whose authority came from his father’s position, exactly the way Caesar’s did, and in direct competition with Caesar for the same throne.

Roman authorities executed people over this claim because it was political, not because it floated some unusual opinion about divine and human natures. The crime was refusing to acknowledge Caesar’s ultimate authority, asserting that someone else held divine right to rule in his place. If the Radical really was Herod’s son, son of god was an accurate political designation for a royal heir claiming the throne his father had held and his blood entitled him to inherit. The title tied him to Roman imperial practice, since Herod was Rome’s own appointed king, and to Jewish messianic expectation, since David’s heir carried the promise of eternal rule. His execution demonstrated what first-century political reality demonstrated over and over: bloodline without institutional backing cannot hold a throne, no matter how legitimate the blood actually is. The later Church kept the title and changed its meaning into something safe to survive inside the very empire that had killed the man who first carried it.