Born in the year 2151, Professor Eobard Thawne idolized a superhero speedster known as the Flash. He replicated the accident behind the Flash's powers and inadvertently tapped into a "negative" version of the Speed Force. Eobard grew bitter and jealous when the Flash, having traveled through time, saved a crowd that he had intended to rescue and, upon learning that he was destined to become the Flash's greatest enemy, grew obsessed with ruining his life as the Reverse-Flash.