See that's what I am talking about, there are a lot of Wonders that can be sped up with Marble or Stone. Which allows for quicker building of the Wonders. Glad you had a good start there IAM.
Yes but if the resources were so common that everyone had some then there would be no advantage as everyone would still build it at double speed. The point is so that you can build wonders faster than someone who doesn't have it.