The task of the church is set forth in the Great Commission, which involves not only baptising, but also discipling, "teaching them to observe all that I commanded you" (Matthew 28:20). God has not given the sword to the church; our only weapon is the sword of the Spirit, the Word of God. But the Word of God speaks comprehensively to all aspects of human life (1 Corinthians 10:31). The Great Commission does not restrict the church to preaching a simple gospel, the way to escape divine judgement. Rather, the preaching of the church presents to the world a way of life that transforms everything, including politics. Chirstians are not saved, of course, by political action. But they must bring their faith with them into their families, their workplaces, and their politics. Of course, in some culture there is not much that Christians can do, other than pray, to influence political structures and policies. But when they can influence them, they should. In modern democracies, all citizens are "lesser magistrates" by virtue of the ballot box. Christians have an obligation to vote according to God's standards. And, as they are gifted and called, they should influence others to vote in the same way.
Taken from my favourite theologian John M Frame's book The Doctrine of The Christian Life. In Zambia the role of the church is very cardinal given the large percentage of citizens who profess Christ. Unfortunately many leaders in the Zambian church have tended to perpetuate poverty and injustice rather stand with the weak. We have touched on this issue in brief posts, but I plan to take a more extensive assessment in a future monthly essay briefly dubbed "The Zambian Church As Agents of Poverty" - an important follow-up to In Defence of A Christian Nation.