 We examine the theory of the set theoretic multiverse proposed by Joel David Hamkins, whose purpose is to address philosophical questions about independence questions in standard set theory, but which when spelled out formally has some of the flavor of an alternative set theory. A set theoretic Platonist might say about the Continuum Hypothesis (CH) that, since there is “of course” a single universe of sets, CH is either true or false in that world, but that we cannot determine which of CH and \(\neg\)CH actually holds. Hamkins proposes as an alternative (taking the same realist standpoint as the classical Platonist, it must be noted) that there are many distinct concepts of set, which we may suppose for the moment all satisfy the usual axioms of ZFC, each concept determining its own universe of sets, and in some of these universes CH holds and in some it does not hold. He says further, provocatively, that in his view CH is a solved problem, because we have an excellent understanding of the conditions under which CH holds in \(a\) universe of sets (note the article used) and the conditions in which it does not hold, and even more provocatively, he argues that an “ideal” solution to the CH problem in which a generally accepted axiom arises which causes most mathematicians to conclude that CH is “self-evidently” true or false (deciding the question in the usual sense) is now actually impossible, because set theorists are now very conversant with universes in which both alternatives hold, and understand very well that neither alternative is “self-evidently” true (the force of his argument is really that the complementary conclusion that one of the alternatives is self-evidently false is now impossible to draw, because we are too well acquainted with actual “worlds” in which each alternative holds to believe that either is absurd).