I believe he had a plan, but he describes what he had created as 'good' therefore nothing would have needed to change because it was perfect. Am I correct in saying that? If so, then if we had kept reproducing, wouldn't we eventually have too many people living on the Earth? We would have either had to stop having children or the earth would have had to be made bigger. It just seems to me that nothing should have to change when his original plan was perfect..