Observations on Thoroughbred Evolution

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Observations on Thoroughbred Evolution By Steven A. Roman, Ph.D. The adage "nothing endures but change", a quotation attributed to the Greek philosopher Heraclitus (c.535-475 BC), is as true in Thoroughbred racing as it is in any facet of life. Most of us who have followed the sport long enough to have developed a sense of its history may easily perceive that things are not as they once were, but many may have a harder time appreciating the nature of the changes they have seen. For example, we know that medication, both legal and illegal, has become more sophisticated and probably plays a greater role than in the past. Yet how well do we understand the depths of its effect on the horses and on the races in which they compete? We have seen legendary races disappear from the scene in favor of new events, or their distances shortened. Those in charge argue such changes are needed and are made in racing's best interests, often to the dismay of purists, traditionalists and nostalgia buffs. And we have observed once dominant sire lines fade into obscurity to be replaced by other emerging bloodlines, either providing breeders with fresh opportunities or, depending on your point of view, demonstrating an erosion of the breed's vigor. Regardless of our feelings about them, the changes occurring in Thoroughbred racing are ongoing and constant. Change is the human condition and it is in our interest to understand the forces of change so that we may establish continuity between the past, the present and the future. Thirty to forty years ago Thoroughbred racing was dominated by a dark bay stallion named Bold Ruler, an elite, classic-winning racehorse and an even better sire. In the 1960s he led the general sire list an unprecedented seven straight times and then once again in the 1970s. No other sire in the 20th century could match that feat. He was the leading
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