Yes as a general influence or cultural/moral narrative, preserving tried and tested things like personal responsibility, the nuclear family, the practice of charity and so on, certainly it has been vital in maintaining societies based on those ideas. Jesus does however present a radically different paradigm - the example of the good Samaritan not hesitating to put himself in danger and treating a stranger as if he were a close relative presages Christ's own self sacrifice. Christ knowingly allowed himself to be taken into the Jewish and the Roman lions den and treated how they saw fit. Christians under the persecution of Rome followed this same example - not that they didn't try to escape, but neither did they see it as their role to take positions of political office in order to influence the state. In the early church any prospective members involved in service to the state were required to renounce that allegiance fully before being baptised into the church. It's a dangerous game, the modern day equivalent is the difference between a church that just stays out of politics - as an organisation, and to some extent as individuals, I don't think a follower of Christ can work in politics without undue compromise, although of course people have views and vote etc - and the obscene image presented by the corrupted 'prayer meetings' organised by the WH etc. You can't dip your toes too far in that pool without being drawn into an entirely other way of thinking.
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