To Save the Soul (Class)

Just to get it out there.. this is a blog on copyrights. Are copyrights fair? Yes and no. Honestly, I believe that the copyright is a product of greed brought upon by capitalism, but that's just speaking in black and white. In a perfect world, we wouldn't need copyrights.. but then, in a perfect world we wouldn't need a lot of things.
Copyrights exist for the noble cause of protecting the copyrighted material's creator from idea theft. In this fashion, it makes perfect sense, but it must be seen that their only importance is in the financial world. That I believe is their flaw. Normally, the artist's purpose in creating a work is to share it. Why then this protection against sharing if not money?
Now artists deserve money just like anyone else, and no one should be able to take advantage of that. Where I see the failure in copyright is in uses that do not include money. I believe that as an artist, as soon as you create a physical work of art, you have decided to share it with the world.
So.. who knows? Do we need copyrights? Don't we? We probably do. It's right along the lines of don't steal cars and don't mug people.
Also... the time limit on a copyright makes no sense...