Original sentence: In this vein, some trainers view the use of particular brands or styles of common equipment as having more to do with personal preference than anything else.Others point out that the very act of catching and training horses is not "natural" at all, that everything people do with horses is not actually "natural" to the horse...The term "Natural Horsemanship" came into popular use around 1985.and has only been widely used since the 1990s, when it obtained a significant boost from the popularity of Nicholas Evans' book ( and later film ) The Horse Whisperer, which promoted popular awareness of Natural Horsemanship
Edited sentence: The term "Natural Horsemanship" has only been widely used since the 1990s, and obtained a significant boost from the popularity of Nicholas Evans' book ( and later film ) The Horse Whisperer, which promoted popular awareness of a gentle approach to horse training