Note: An estimation of the word count puts their number at below 33,000: thus, this is a novella by ISFDB standard.

Synopsis: From the first page of the Ace first edition: "In space war, seeing is not believing! The twenty-year Earth-Mars war was finally over. What was left of Earth - its crumbling cities, its ruined farmlands - were firmly and completely under the rule of the Martian Archon. And this powerful planetary ruler was taking no chances: he intended to reduce the Terrans to a society of primitive agricultural tribes in less than a generation! But for David Arnfeld, ex-spaceman and Earth Base Commander, there was something in the whole setup which didn't ring true. What had both sides muffed countless chances to end that awful war in its first year or two? And why had the two planets gone to war in the first place? In the back of Arnfeld's mind and idea was growing... perhaps there was yet a chance to save the doomed population of Earth. But if his idea were true, and proof was available, he had to work fast. Too many people were involved in this War of Two Worlds to let one man upset their plans!"