World atavism

** "World Atavism" by Edmond Hamilton is a science fiction tale where the fate of humanity hangs in the balance due to a catastrophic manipulation of solar vibrations. The story centers on Dr. Allan Harker and his companion Dr. Raymond Ferson, as they investigate the mysterious disappearance of Dr. Howard Grant, a biologist who claims to have unraveled the secrets of evolution itself, only to discover a terrifying truth: Grant has triggered a global regression, reverting people to primitive, savage states. As society crumbles under the weight of escalating violence and chaos, Harker and Ferson embark on a desperate mission to find Grant and reverse the process, grappling with themes of scientific hubris, the impermanence of civilization, and the dark potential lurking within humankind, ultimately culminating in a powerful conclusion that touches on despair and hope amidst the ruins of a fallen world. **