The roman empire eroded internaly for that very reason. You can boil a frog by placing it in a pot of cold water, then gradually increase the heat. It will accept the fact that it will eventually become a stew.
The decay of our morality will be the ruin of our nation in much the same way.
History has proven that when morality declines, apathy increases. No established society can withstand moral decline. It has been proven through the historical record since the begining of time. (and yes, there was a beginning as the bible points out)
...from bondage to spiritual faith; from spiritual faith to great courage; from courage to liberty; from liberty to abundance; from abundance to complacency; from complacency to apathy; from apathy to dependency; from dependency back again into bondage.
-Alexander Tyler, 1750
It is JUST A MATTER OF TIME!!