In three parts, from Physical Culture magazine, July - September, 1911. In this story, the author warns of the coming of a world war between Japan and U.S. While the Japanese have a superior society, they suffer from food shortages and over-population so go to war with the U.S., who is plagued by a society of ill health and habit. Some predictions are remarkably accurate. The story itself was commissioned by Bernarr Macfadden, who was an early proponent of health and fitness in the U.S. and founded the magazine publisher McFadden Publications.

"An example of early dystopian science fiction written shortly after World War I, ""City of Endless Night"" imagines a future with a very different ending to the Great War. Set in 2151 and in an underground Berlin, our protagonist is Lyman De Forrest, an American chemist who enters the city to discover the hidden truths of a forbidden metropolis. The subterranean world hosts a highly-regimented society of 300,000,000 sun-starved humans. As the first outsider to enter, he's horrified by what he finds, but will he accomplish his mission and escape the living tomb? - Summary by Kate Follis"