The Edge of the Knife
by H. Beam Piper
Part of this prolific author's popular "History of the Future" series, this story takes place just before the devastating world war that took place in 1973, which wiped out most of humanity and led to the rise of a new world order. The story focuses on the main character, who is tormented by short glimpses into the future. Many fans see this story as a thematic touchstone that unites much of Piper's work.