In the place I live, Churches have no importance at all, no influence to the society, they are like dead societies, have no connection with the people in the society.
What sort of importance or influence do you think churches should have socially? Do you mean that no churches provide charity work, or work with the hungry or poor? If that's the case, that's certainly not good.
Or do you mean some kind of political influence? Because I'd argue that as Christians we shouldn't want our churches to be in that kind of position. Historically the mingling of political power and the Christian Church has generally been a bad thing; the powers that be exploiting the faith and the Faithful in the use of violence, something the Church should have absolutely no role in. The Inquisition, the Crusades, Pogroms, all very bad things that have happened through the exploitation of religion for power and profit.
The Church has a purpose in this world, and it's not to rule it, but to serve it through acts of service and proclamation of the Holy Gospel, living out its mission peaceably, lovingly, respectfully, and graciously.
Now, can individual Christians act as good stewards of their neighbors? I think so, but it must be done vocationally. For example, in my vocation as citizen I participate in the democratic process of my country, and that affords me to give my voice in regard to social systems that exist, and can therefore offer my voice in affecting change in the direction of civil justice in regard to the poor, the hungry, maligned and disenfranchised minority groups, and the least of these. That is part of living out my vocation as a citizen. That is how I live as a Christian, in the world, in relation to my neighbors.
-CryptoLutheran