The idea that the king is a god was pretty much universal in the ancient world. Monarchs were seen either as deities, descendants of the gods, or as their divinely appointed representatives. The first Mesopotamian ruler to declare himself to be divine was Naram-Sin of Akkad. Ruling sometime in the 23rd century BC, he referred to himself as the husband/warrior of the goddess Ishtar. Even before that, Egyptian pharaohs were seen as incarnations of either Horus, the war and sky god, or Re, the sun god. Mayan kings were supposedly possessed by gods. Kings were also regarded as sacred in Polynesia, Africa and, until the end of World War 2, even Japan.
In Jesus' day, the Roman emperor wasn't considered a god until he died. That changed with Caligula. Yet even before him, people worshiped the genius or divine spirit that accompanied the emperor from his birth to his death. The Jews refused to do this, of course, and Rome, realizing that monotheism was essential to Judaism, got them to agree to pray to Yahweh for the emperor. But elsewhere, the emperor was treated as a god for all practical purposes. The Senate could not oppose him and the Roman Republic was no more. The emperor had absolute power over everyone's lives.
That was the main reason why Christians were persecuted. By declaring Jesus Christ to be Lord of all and King of kings, Christianity was saying that neither the emperor, or any earthly ruler, had ultimate power. There was Someone over them to whom even they ought to swear allegiance. So beginning with Nero, it became dangerous to proclaim that Jesus was the unique Son of God. Because it meant he had the last word on what was right and what was wrong, regardless of what any earthly authority said was legal.
Ancient Israel, however, did not always have a king. When the tribes were attacked, God called a person, male or female, to be their leader. (Judges 4:4-6) These were called judges. But eventually the people approach the aging Samuel, then the current judge, and say, “Appoint over us a king to lead us, just like all the other nations.” (1 Samuel 8:5) Samuel is upset and prays to God. The Lord says to him, “Do everything the people request of you. For it is not you that they have rejected but it is me that they have rejected as their king. Just as they have done from the day that I brought them up from Egypt until this very day, they have rejected me and have served other gods. This is what they are also doing to you. So now do as they say. But seriously warn them and make them aware of the policies of the king who will rule over them.” (1 Samuel 8:7-9) And Samuel warns them that by giving one human being such power he will conscript their sons into his army, make their daughters work for him, and take their best fields, vineyards, servants and animals for himself and for his administrators.
God had anticipated that the people would want a king before they even entered the land of Canaan. In Deuteronomy 17, God sets some limits over how a king should act. He should not accumulate horses for himself. He must not marry many wives or acquire a lot of gold and silver. He must write down God's law, keep it with him and study it all his life. And finally he should not “exalt himself above his fellow citizens or turn from the commandments to the right or to the left...” (Deuteronomy 17:16-20)
That kind of king is not a god but a godly person, knowing and obeying what God requires from us all. Like not having any gods other than the Lord, not creating any images to be worshiped, not misusing God's name, setting apart the Sabbath as a holy day, honoring one's parents, not committing murder, not committing adultery, not stealing, not giving false testimony against others, and not desiring what someone else has. A ruler who breaks these 10 commandments is not a godly person. When David committed both adultery and murder, God told him through Nathan the prophet that it would bring disaster upon him and his household. (2 Samuel 12:9-10) Again the king is not a law unto himself but must follow God's law, even in his personal life.
After Christianity had become a legal religion, the problem for all the subsequent kings and emperors was that now they had to admit that there was in fact an authority higher than them. So they tried to tame Christianity. They made it the only legal religion so they could restore it to the role that religions had before Jesus: to bless the status quo. They made the church an arm of the state. Some rulers, like King James 1, claimed the divine right of kings, which meant their authority came directly from God, and thus they could not be held accountable to any earthly authority, like, say, Parliament or some other elected body of mere men. Or those clergy who preached against them.
Such rulers leaned into the part of Romans 13 that says, “Let every person be subject to the authorities over him. For there is no authority except by God, and the authorities that exist have been instituted by God. Therefore the one resisting the authority has resisted the arrangement of God; those resisting will now bring upon themselves judgment.” (Romans 13:1-2) But rulers ignore the verse that follows, which says, “for he is God's servant for your good.” (Romans 13:4) If they don't do that with their authority, they aren't fulfilling their purpose. Didn't God, in spelling out how kings should behave, warn the people that such a powerful person is likely to do things that are not good for them? Aren't there numerous examples of kings of Israel and Judah who did what was evil in God's sight? And didn't God's prophets point that out, even at the risk to their own lives?
What God arranged was not a person but a position of leadership. Order is preferable to chaos. But if the person in a position of leadership is not good or wise, if what he or she is doing is evil, like Queen Jezebel of Israel who killed God's prophets (1 Kings 18:4) or King Manasseh of Judah who worshiped other gods and killed innocent people, God will not support them. (2 Kings 21:1-16) King Herod Agrippa had James the brother of John executed and Peter imprisoned. When he accepted the people's praise for having the voice of a god and did not give glory to the Lord, he was struck down by a deadly illness. (Acts 12:1-4, 21-23) When the Sanhedrin, the council that had the authority over the Jews in Jerusalem, gave the apostles strict orders not to teach in Jesus' name, Peter and the Twelve replied, “We must obey God rather than people.” (Acts 5:27-29) Having authority isn't a blank check or permission to do what you will, no matter how evil. After all, we rightfully see those who disobeyed Hitler, the legally appointed chancellor of Germany, as heroes. Christians like Dietrich Bonhoeffer and Karl Barth spoke out prophetically against the Nazis, who were the official party of the government.
In the countries where Christianity has come to be accepted, few political leaders have dared to declare themselves to be God. However, cult leaders have. And Jesus knew this would happen. He said, “For false messiahs and false prophets will appear and perform great signs and wonders to deceive, if possible, even the elect.” (Matthew 24:24) And, of course, it is especially dangerous if a political leader is also the leader of a cult, and accepts the title of Messiah or God. Paul foresees one whom he calls the “man of lawlessness” who will set himself up as God. (2 Thessalonians 2:3-4) He could have been speaking about an emperor such as Nero. But as someone said, while history may not exactly repeat itself, it rhymes. The possibility of such a politician is always there.
Because there are always arrogant people, people who think they are smarter, better and more competent than anyone else. And when the arrogant are given power, the people under them suffer. As Psalm 10 says, “The wicked arrogantly chase the oppressed; the oppressed are trapped by the schemes the wicked have dreamed up. Yes, the wicked man boasts because he gets what he wants; the one who robs others curses and rejects the Lord. The wicked man is so arrogant he always thinks, 'God won't hold me accountable; he doesn't care.' He is secure at all times. He has no regard for your commands; he disdains all his enemies. He says to himself, 'I will never be upended, because I experience no calamity.' His mouth is full of curses and deceptive, harmful words; his tongue injures and destroys.” (Psalm 10:2-7) Such people have always existed. And somehow they have always managed to get other people to grant them power.
Unfortunately, when leaders declare themselves to be god, it's not because they desire to be like God in terms of character but in terms of power. They want to be obeyed like God but they do not want to obey him. And they certainly do not want to emulate the only person in the Bible who is held up as the ideal king: Jesus, God Incarnate.
Jesus refused earthly and political power at his temptation in the wilderness. He did not claim it when he was arrested, when asked if he was a king by Pilate, or when the jeering crowds told him they would believe he was the king of Israel if he came down from the cross. (Matthew 4:8-10; 26:51-54; 27:42; John 18:36) Instead he said, “For even the Son of Man did not come to be served, but to serve, and to give his life as a ransom for many.” (Mark 10:45) And he did serve others. He healed them. He fed them. He showed them God's love and forgiveness, not just in what he said but in what he did.
Jesus did not use the power God gave him to make his own life better but to make the lives of others better. And overwhelmingly they were the poor and the despised and the excluded; the people powerful folks call losers. Jesus didn't just project an image of caring and healing; he actually touched the blind, the lame, the lepers, and the dead. And he said that if we really want to serve him as our King, we need to give the hungry, the thirsty, the naked, the sick, the imprisoned and the immigrant what they need. Because whatever we do to those whom the world counts as the least important, we do to him. If you want to see Jesus, don't look to the powerful but the powerless and to those who serve them like Jesus did. (Matthew 25:31-46)
All those ancient kings and emperors who declared themselves to be gods are dead. No one worships those psychopaths and narcissists any longer. Their power died with them. But Jesus lives and his power is still active in the world. Unlike those false god-kings, he did not leave a legacy of cold and dead monuments, doomed to crumble over time or be demolished. His legacy is the people who still trust him and follow him, who obey the commandments to love God with all they are and all they have, and to love their neighbors as they do themselves and even love their enemies. That legacy will live on until Jesus returns and the kingdoms of this world will become the kingdom of our Lord and of his Christ. And he shall reign forever and ever.