One of the leading organizations doing this is the Chuck Colson Center for Christian Worldview. Here is how the organization describes itself on its website:
"Through the proclamation of Truth, leadership training, and collaboration with like-minded organizations, The Chuck Colson Center for Christian Worldview seeks to build and resource a movement of Christians committed to living and defending the Christian worldview. Founded by Chuck Colson, the Colson Center is a part of Prison Fellowship Ministries."
Please peruse their excellent website for resources which will inspire and equip you to make a difference in our society. Please also pray for the work of the Colson Center, and "Like" them on Facebook.
Also, don't miss their weekday "BreakPoint" broadcasts: quick, five-minute episodes with insightful comments on the issues of the day, from a Christian point of view. Listen here, or catch them with a pod catcher on your smartphone.