The horse world is a booming industry. Horses have come into their own as companion animals and are now treated as family members instead of pieces of machinery. The development of the equine industry has allowed people with different styles of training to create lucrative livings dealing with horses. The techniques of natural horsemanship, or natural horse training have grown to a point where an industry has formed. This thesis examines the elements of horse behavior that contribute to the natural horsemanship system. It will also study the history of the relationship between humans and horses, and the industry that natural horsemanship has become. Finally, the effects of natural horsemanship on both the equine world and society as a whole will be examined.