Now, I'm no historian. I was even raised Catholic. But. An entire empire, really?
So a quick read through historical viewpoints proves that a number of historians have pinpointed not just one but quite a few causes of Rome's decline from being the superpower of its time. Reasons like inflation, lead poisoning, the division of the seat of power, corruption, a crippling deficit (hint), even, OMG, Christianity which introduced contradictory values to running the empire. Sure there was certainly a level of debauchery that increased with Rome amassing power, amongst which were orgies of every sexual orientation, statements like this are meant to have us envision what? That Rome was essentially an amped up Fellini film spliced with racy episodes of Spartacus, something like Gay gone Wild?