
Unseen forces can manipulate primitive behavior without conscious awareness.
Alien observers initiate a subtle ecological disruption among primitive human populations along ancient European riverbanks. A sudden, unexplained mental impulse compels the cave-dwellers toward the east shortly after an extraterrestrial craft departs. Lacking scientific concepts or vocabulary, the savages accept the irrational urge without recognizing its artificial origins. Driven purely by appetite and survival, they obey a force engineered from above.
Part 1

