Richard Dawkins, the evolutionary biologist, wrote against speciesism in "The Blind Watchmaker" (1986), "The Great Ape Project" (1993), and "The God Delusion" (2006), elucidating the connection with evolutionary theory. He compares former racist attitudes and assumptions to their present-day speciesist counterparts. In the chapter "The one true tree of life" in "The Blind Watchmaker", he states that it is not only zoological taxonomy that is saved from awkward ambiguity by the extinction of intermediate forms but also human ethics and law. Dawkins states that what he calls the "discontinuous mind" is ubiquitous, dividing the world into units that reflect nothing but our use of language, and animals into discontinuous species: