A racehorse is a horse specifically bred for speed and agility in competitive racing. This topic has been examined by naturalists, breeders, and historians, who emphasize its development through selective breeding and human influence. Charles Darwin observed how English racehorses owe their superiority to generations of meticulous selection, while August Weismann used them as an example of unconscious directional change through competition.
Julia Ellen Rogers highlighted the gradual refinement of characteristics over time, and accounts from Racehorses in Australia reflect discussions on breeding methods and regional identity. These viewpoints collectively illustrate the interaction between biology, culture, and the quest for excellence in equine athleticism.