Thoughts for and against the idea of predestination can go here.
For the record, I do not believe that the Bible teaches that God predestines people merely on the basis of what He chooses for them. The Bible says that God predestines people according to His foreknowledge. I believe He predestines based on the kind of ways they would respond to His grace in its various forms. This is done to ensure that at least some people have a chance to be saved to the end.