Duty to Shape Culture

In my youth, the concept of a social gospel was explained to me this way, the true gospel says God changes people from the inside out, giving them a new heart. The social gospel says humans can change people from the outside in, using persuasion and compulsion to achieve utopia on earth. Probably does not give the concept a fair shake.

Rather than rehashing to various historical beliefs, as discussed here:
Social Gospel - Wikipedia
my focus is on the obligation, if any, for Christians to act in unity to shape our culture to the advantage of Christ. What does the bible say about supporting leaders who reflect biblical principles?

 

"As a result of His [Christ's] loyalty to the truth, He was not afraid to dissent publicly from official doctrines (if He knew them to be wrong), to expose error, and to warn His disciples of false teachers. He was also extremely outspoken in His language, calling them ‘blind guides’, ‘wolves in sheep’s clothing’, ‘whitewashed tombs’ and even a ‘brood of vipers’…we seem in our generation to have moved a long way from this vehement zeal for the truth which Christ and His apostles displayed.” [From the internet}

 

The Romans saw the Christians as strange and subversive as they only believed in one God and refused to worship Roman gods. Several persecutions of Christians occurred under various Roman emperors, including Nero and Diocletian, with followers often tortured and executed in brutal ways. Despite the dangers, Christianity continued to attract new converts leading up to the 4th century CE.

 

One purpose of the Christian Church is to present bibli9cal doctrine, even when it influences political doctrine.