Over time, TV desensitizes the viewer to traditional cultural norms of good and evil through presenting what was once considered evil as normal, acceptable and eventually good. Unless one has a strong, foundational worldview of what constitutes good and evil (The Bible - God's objective standard i.e. His character) the viewer will be receptive to the shift in morality that is being engineered by those who want to see the breakdown of Christian society and its institutions. TV viewers are being conditioned, through desensitization, to accept what society previously considered immoral and evil. The left call this progressive.