Fârâbî does not accompany the initial thesis of the Perfect City, “The first being [mawjûd] is the first cause of existence [wujûd] to all other beings [mawjûdât]”, by any explicit proof. What is his strategy for convincing the reader to accept it? On the face of it, there are several ways in which this thesis could be falsified. There might be no first being, because every being has another being prior to it, ad infinitum. Or there might be many beings each of which is “first” in the weak sense