The intelligent-design (ID) movement began in the late 1980s as a challenge to the perceived secularization of the scientific community, which leaders of the movement maintained had been coloured with the philosophy of atheistic naturalism. ID theorists have focused their critique primarily on biological evolution and the neo-Darwinian paradigm. They claim that because certain biological features appear to be "irreducibly complex" and thus incapable of evolving incrementally by natural selection, they must have been created by the intervention of an intelligent designer. Despite this focus on evolution, intelligent design should not be confused with biblical or "scientific" creationism, which relies on a particular interpretation of the Genesis account of creation.
We believe that intelligent design is neither sound science nor good theology. Although the boundaries of science are open to change, allowing supernatural explanations to count as science undercuts the very purpose of science, which is to explain the workings of nature without recourse to religious language. Attributing complexity to the interruption of natural law by a divine designer is, as some critics have claimed, a science stopper. Besides, ID has not yet opened up a new research program. In the opinion of the overwhelming majority of research biologists, it has not provided examples of "irreducible complexity" in biological evolution that could not be explained as well by normal scientifically understood processes. Students of nature once considered the vertebrate eye to be too complex to explain naturally, but subsequent research has led to the conclusion that this remarkable structure can be readily understood as a product of natural selection. This shows that what may appear to be "irreducibly complex" today may be explained naturalistically tomorrow.