I don't believe in evil, I believe only in horror. In nature there is no evil, only an abundance of horror: the plagues and the blights and the ants and the maggots. ↗
In the book, America had already been weakened by bio terror plagues before waves of selfish violence took down the rest. But the real enemy was the kind of male human being who nurses fantasies of violent glory at the expense of his fellow citizens. ↗