 What is the meaning of Dondromogon’s two extreme hemispheres?
Warrior of Two Worlds By MANLY WADE WELLMAN He was the man of two planets, drawn through the blackness of space to save a nation from ruthless invaders. He was Yandro, the Stranger of the Prophecy—and he found that he was destined to fight both sides. [Transcriber's Note: This etext was produced from Planet Stories Summer 1944. Words formed themselves on my thick tongue, words that must have been spoken by so many reviving unfortunates through the ages: "Where am I?" "It was ordered—by the Masters of the Worlds—that you should be brought from your own home planet, called Earth in the System of the star called Sun. It is as well, for this will be a birth and beginning of your destined leadership on Dondromogon." The voice was telling me that I had been snatched from worlds away, for a specified purpose here on whatever windswept planet Dondromogon might be. One face of Dondromogon ever looks to the light and heat, wherefore its metals run in glowing seas. But because Dondromogon wavers on its axis, there are two lunes of its surface which from time to time shift from night to day. My eyes were tight shut against the dust, but they saw in imagination such a planet—one-half incandescent, one-half pitchy black. From pole to pole on opposite sides ran the two twilight zones, widest at the equators like the outer rind of two slices of melon. Of course, such areas, between the hot and cold hemispheres, would be buffeted by mighty gales ... the voice was to be heard again: "War is fought between the two strips of habitable ground. War, unceasing, bitter, with no quarter asked, given or expected. Dondromogon was found and settled long ago, by adventurers from afar. "Suffice it that you were needed, and that the time was ripe. There is a proper time, like a proper place, for each thing and each happening. On this strange world called Dondromogon, what manner of intelligent life bade defiance to heat and cold and storm, and built these stout structures, and now laid hands—were they hands indeed?—upon me? Each also had a shorter weapon, with a curved stock to fit the palm of the hand, borne snugly in a holster. Especially as I don't know who I am, or where I'm from, or anything that has happened longer ago than just a moment.
 It causes its inhabitant groups to fight over what amount of the planet is habitable, the two extremes symbolizing the split between peoples.
 It causes its people to develop two vastly different cultures, creating social tension.  It causes its people to search for prophets, martyrs, and heroes, symbolizing the schizophrenia of the planet’s inhabitants.  It causes its people to live underground, giving the story its setting.  It causes its inhabitant groups to fight over what amount of the planet is habitable, the two extremes symbolizing the split between peoples.