"Intelligent Design," like most phrases, means more than one thing.
A person who believes in
intelligent design (
id, in lower-case italics, for this post) believes that
some entity designed some or all of the various properties of, and entities in the universe. For example, one might believe that a supernatural being designed the properties of atoms, such as
Carbon. This supernatural being might or might not be the God of Christianity and Judaism. All people I would classify as Christians believe in
id. There are certainly great differences in details -- some believe that God designed the universe in such a way that it would naturally emerge in its present form from the Big Bang, others believe that God specially designed and created each type of living organism. Some believe that the earth is only a few thousands of years old, others that it is much older than that. Some believe that God used seemingly random processes to bring about His purposes, some do not. Persons who believe in
id do not belong to any particular organization, and do not generally act in concert. However, they are united in believing that neither the universe, nor humans, are here as the result of purposeless chance.
Another meaning of the term is the
Intelligent Design Movement (ID). ID adherents do have a central organization, the
Discovery Institute. They subscribe to
id, but also have more specific beliefs, as follows:
1. It is possible to demonstrate supernatural design scientifically.
2. Intelligent Design should be taught in the public schools, in science classes.
3. Teaching Intelligent Design in public school science classes is an effective way for Christians to combat atheism.
All who are in the ID movement subscribe to
id.
Many Christians, some of them scientists, some of them theologians, believe in
id, but disagree with ID. They do not subscribe to any of the 3 specific beliefs listed above. For one thing, some of them they may believe that
the Bible, itself, indicates that specific belief 1 is incorrect. For another, they see that the protection the US Constitution provides against state sponsorship of any particular religious belief is important, and that implementing specific belief 2 would violate that. The ID movement often seems to be deceptive, in that it attempts to identify itself with young-earth creationism, although the two are
not the same thing. It also seems to be deceptive, in that, although specific belief 3 is well-documented, and spoken of as a strategy by leaders of the ID movement, they sometimes deny it, at least when in court.
The
Kitzmiller case, although not tried by the US Supreme Court, rejected an attempt to carry out specific belief 2.
A blog I subscribe to, by a Christian author, discussed the deliberate deception, while under oath, of an official of the
Foundation for Thought and Ethics, an organization claiming to be Christian, and closely allied with the Discovery Institute. You can read that discussion
here.
Thanks for reading.