What tends to happen in legislation is definitions get blurred, philosophies confuse. So the intent of the original law is lost and changes. For instance, homosexual marriage. The definition of marriage has changed according to man. But one of its original intents was bearing fruit (a child). It produced another life in a family structure. Now marriage is seen (according to the state) as a contract on a piece of paper, not a covenant with God. The essence of marriage still exists, but in fallen human thinking, it has lost its original purpose.
In short, the church is light and salt, preserving and speaking truth to the culture. The church is here to fight against cultural confusion and falsity.
In the ancient church, it fought against many pagan religions and attitudes that it produced. The modern church does much the same. Idolatry has not changed, the objects of idol worship have shifted. The church is a voice in the social order. It seems a government will usually be in opposition to the church. But what do we have to lose if the church influences and changes the way government is done?
There are many opinions concerning this issue. This is only one. In short, it is the Lord who saves and transforms people, not government or systems put in place solely by man.
For instance, gun control: more and more regulations will not solve the sin of murder. If all the guns in the world were banned, murder would still exist. It is person’s who are sinful, not an object. It is the will of a person that has fallen. Sin is an empirically proven doctrine of religion. When the reality of sin is denied, law will not correct the problems of people’s mistakes.