But then there are the modern day versions—since they do reduce the population of the virtuous,value orientated citizen patriots who built America— of the Black Death called elective abortion,sterile sexual perversions and taxpayer support of shiftless entitlement junkies. Plus the barbarians in the form of illegal aliens are already infiltrating ALL our borders. Finally,the obvious analogy of a disconnected from the people,jaded,avarice and power addicted government that just can't give a damn until it is too late with the removal of their own heads at the hands of the savages they let in.
I guess the ongoing illegal/legal invasion isn't impressive enough for you. As for the plague, abortion might fit the bill.