Public Theology and What Affects It
The need to continually speak for Christ is a resounding one.  Despite the fact that this is universally seen as a need, it is still faced with huge problems.  As you read this article to the end, some of these problems will be manifest but see The Reformed Conservative.
The first problem emanates from the British evangelical and Reformed church.  The reason for this is the failure to devote needed devotion to construct public theology.  Many churches loathe any public engagements since they see them as a distraction for their mission.  Indeed, what is biblical is this view itself.  The truth of the gospel is wanting in this kind of view.  It is so worrying that many churches will not want to have anything to do with public life since to them, it is sinful.   Such an engagement requires a proper rationale and this is what is lacking but see The Reformed Conservative. This task has been left to a few courageous church organizations.  Unfortunately, the situation may not change unless there is a paradigm shift. This is a very sad truth.  
The situation in the US is not as grave as it is in other parts of the world.  Sadly, there is very; little to celebrate since it is far from where it should be.    There are a danger people making oversimplified responses to ethical issues. The danger is magnified by the fact that there is no clear public theological framework.  Each passing day sees a complexity of the issues and there is, therefore, a need for a theological base.  Indeed, a mere yes/no approach will not address the issues. For instance, end of life challenges cannot be addressed by a yes/no approach.  Divorce and capital punishment are the other complex issues. These have been rightly described as the Wikipedia-level simplicity.    
Christians become aware of particular issues when there are proposed changes to the law.  The perplexing thing is that the Christians may fail to understand that these changes have been on the offing for many years on a row. A case in point is that Christians lost the battle for same-sex marriage form the mid-1960s but not in March 2013. There were consistent issues which were largely ignored by Christians since that time that challenged the Christian framework that existed in law.  The failure by Christians to participate in public engagements to guard their faith led to the allowing of same-sex marriage since March 2013. Click here to learn more about reformed conservative. 
 It is needful to understand that the situation will be effectively addressed if the Christians give themselves more to worshipping God and also shout when it is needful.