During the 80's there was a vast number of television channels and even some printing companies that took pleasure in re-doing (over and over again!!) the prophecies of Nostradamus... I remember one that said that in the last days man would eat man (and my grandmother and my father started a deep conversation as if it would be political or literal)
Time has passed (yeah, no shit!) and we have seen several things that have brought Nostradamus to a front space in our bookshelves... The 9/11 attack, the Saddam Hussein murder/execution, the infamous Bush administrations, I mean, not to offend anyone but I am still waiting for the evidence of weapons of mass destruction and I am pretty sure that the thousands that die as a consequence of that "gap" (to put it mildly) would like to see the evidence too.
History repeats itself, that is no secret and is something known far and wide. In Victorian times people used to have "memento mori" pictures taken of their loved ones, these are now known as "postmortem photographs" this with the idea of preserving the last image of the one that they will be burying shortly. While this is understandable one should consider if this is an morbid thing or something done from love.
After all, the last picture will not be something that you could see move (Harry Potter's world is fictitious, by the way), so the image will only cause the pain of departure to linger in one's mind. IMHO it would be far better to rely on memory and family pictures to keep the loved one "alive" (so to speak, said Dr. Frankenstein)...
Thing is that this Victorian tradition has rooted itself again in modern day society. Apparently one of the most important sources are military funerals (duh!) where the families of the fallen heroes just can't cope with their losses.
And I can't help myself but see some sort of irony. The military families seek to preserve those who already left and in other parts of the USA, children are being murdered by their care givers...
To round up this idea... I do not think that Nostradamus was referring to man eating man in either the political or the literal sense... If we are to apply that statement to modern day society I would say that it is a rhetorical eating where the society that in Nostradamus' time was focused on protecting each other and presenting a common face, has vanished and left a society where the individual looks for him or herself without any recognition or care if the youngest pay the price.
Of course, it could also be that Nostradamus was simply way off!