There are plenty of sites out there about it, but I will point to a few before attempting to sum up my understanding of this interesting idea. First off, here is a google search, followed by a useful summary.
First off, I'm sure most of you agree with what materialism is. It's the philosophy that only the material world has any reality. Idealism is basically a contrast to this idea. The useful summary does a wonderful job of explaining this, I will now summarize the summary.
Two very different things can be said to have a property. For example, a woman or a statue can be said to possess the property of beauty. Before we can make such a statement we need to be understand what beauty actually is. Plato (amongst others) argued that there must be something which is "beauty itself", in other words an 'ideal beauty'. This beauty itself is what we say our above entities possess.
Of course, one can never find beauty itself. It is not a material concept, but an idea (hence idealism). These aren't ideas that we think of ourselves, anymore than we construct colours ourselves. They are a mental perception of a reality that exists independantly of us. Our perceptions are not perfect, so we all see these ideas slightly differently.
This could apply to physical objects too. There are many different things which would be described as being a table, but there is some 'ideal table' which all other tables share properties with.
Where creationism fits in
And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so. Genesis 1:24
Creationists see this statement and they take it to mean that "cats have always been cats, dogs have always been dogs". That is to say they believe that the first cat kind that was created was some kind of ideal form of cat and that every cat after that has degraded (entropy analogies abound). They take the concept that some things have ideal forms, but instead of saying that they are a mental perception of some seperate reality, they specify and say that these forms are from a divine reality.
I don't think creationists take this idea to its full extent. I don't think they believe in a divine ideal table. Tables aren't a baramin (kind).
When is a door not a door?
When its ajar! HaHa. But seriously, the notion that there are ideal forms of something, or 'kinds' leads us to some problems. At which point, during very subtle changes, does a table become a desk? When does a desk become a work surface, when does a work surface become an Ottoman? And when does an Ottoman become a sofa? What single small quantum of information is changed that changes one thing into another thing? Are these transitions still the original 'kind', the new 'kind', or a whole new 'kind' of their own?
Christian Evolution
It is not in question that some Christians believe that evolution happened. YECs are usually quite scornful of this, and dispute that these are Christians at all since they are denying the Creation and by extension, God. Let's look at the genesis quote again. "Let the earth bring forth the living creature after his kind". What if 'kind' was an ever changing thing, rather than harking to an ideal form? With that shift in viewpoint, Christian Evolution becomes a little more understandable. The Hebrew word used here is Baramin - 'Created Kind'. The obvious counter argument is that 'created' refers to the original creation, but what if it refers to each creation event that is manifest in conception? Evolution is quite happy with the idea that each creature that is brought forth is after its parents kind.
Well, the last two points are not really the central themes, just some intellectual ruminations, tangents if you will. The more central idea is regarding idealism. Do you agree with my assessment that Creationists have taken the idea of ideal forms on board in their model? If this central facet of creationism is based on Plato, does that raise any problems? I can't think of the exact nature of any problems, before you ask, but it does seem a little strange. I thought the subject would either make for interesting discussion, or end up with no discussion whatsoever. Make of the thread what you will
