Blaming Christianity and Traditional Values for Society's Ills

It's not new - Gibbon's Rise and Fall of the Roman Empire was highly popular in the Elite anti-Christian circles of the early 20th century.

And, yet, the factors that actually were quite damaging to society were not Christian, at all. Will Durant wrote:

The breakup of the old religion had begun long before Christ…Moral disintegration had begun with the Roman conquest of Greece [in the 2nd Century B.C.], and had culminated under Nero [in the mid-1st Century A.D.]; thereafter Roman morals improved, and the ethical influence of Christianity upon Roman life was largely a wholesome one. It was because Rome was already dying that Christianity grew so rapidly. Men lost faith in the state not because Christianity held them aloof but because the state defended wealth against poverty, fought to capture slaves, taxed toil to support luxury, and failed to protect its people from famine, pestilence, invasion, and destitution; forgivably they turned from Caesar preaching war to Christ preaching peace, from incredible brutality to unprecedented charity, from a life without hope or dignity to a faith that consoled their poverty and honored their humanity. Rome was not destroyed by Christianity, any more than by barbarian invasion; it was an empty shell when Christianity rose to influence and invasion came…. The political causes of decay were rooted in one fact—that increasing despotism destroyed the citizen’s civic sense and dried up statesmanship at its source.

As for Christianity's influence on a secular society, I offer you Telemachus, the lone monk whose death ended the gladitorial games of the Empire.