History of the domestic sheep exact line of descent between domestic sheep and their wild ancestors is unclear. The most common hypothesis states that "Ovis aries" is descended from the Asiatic ("O. orientalis") species of mouflon. A few breeds of sheep, such as the Castlemilk Moorit from Scotland, were formed through crossbreeding with wild European mouflon. The urial ("O. vignei") was once thought to have been a forebear of domestic sheep, as they occasionally interbreed with mouflon in the Iranian part of their range. However, the urial, argali ("O. ammon"), and snow sheep ("O. nivicola") have a different number of chromosomes than other Ovis species,
What Wild Ecstasy criticized the "rather simplistic narrative thread" of his book, describing it as a "mess". She wrote that, "Heidenry is difficult to follow as people appear, events suddenly happen, and few connections are drawn." She maintained that his real interest was pornography, and that he neglected other topics; she described his chapter on homosexuality as "a dry twenty-page civil rights discussion", and also accused him of giving insufficient attention to women. What Wild Ecstasy What Wild Ecstasy: The Rise and Fall of the Sexual Revolution is a 1997 book about the sexual revolution by John Heidenry. The book received mixed reviews.