" The Cosmic Landscape The so-called “cosmic landscape” of worlds permitted by M-theory has become something of a phenom lately. It’s important to understand that the landscape is just a range of possibilities. Some people have misinterpreted it to mean that all these different universes actually exist. Some have thought it undermines the argument for design because the landscape must include life-permitting worlds like ours. But the cosmic landscape is not real; it’s just a list of possibilities. It describes the range of universes that are consistent with M-theory. "

― William Lane Craig , On Guard: Defending Your Faith with Reason and Precision