The zombie
apocalypse has begun. Actually it began many years ago, it has just been progressing rather slowly as far as apocalypses go.
The leaders and perpetrators of the
inevitable zombie apocalypse are creatures referred to as "psychiatrists". These individuals have medical degrees and legally prescribe people drugs that turn them into zombies. They get away with this by claiming these drugs help conditions such as depression and
schizophrenia, when in fact all they do is cause people to have no emotions and give people an intense urge to consume human brains orally.
Whether or not the psychiatrists themselves are zombies is open for debate. They may just be paid by the zombiefied government to spread the good zombie word.