The "wedge document" was authored by the Discovery Institute.

http://en.wikipedia.org/wiki/Wedge_strategy

Purpose is to overthrow materialism in science, i.e. methodological materialism (as opposed to philosophical materialism).

What does that mean?

When you think "materialism" think "physical evidence" and "physical explanations."

What their ultimate goal is that want to be able to downplay the importance of actual physical evidence in science - why? Because they don't have an awful lot to support their position. Actually, they have none.