 In general, any object that actually exists possibly exists. Assuming that actuality (of an object) is nothing but actual existence and possibility (of an object) is nothing but possible existence, this grounds the plausible conceptual connection between actuality and possibility noted earlier: (i) every actual object is a possible object. The overall philosophical merit of the possible-worlds framework cannot be judged without close scrutiny of its metaphysical foundations. Specifically, the two key questions which need to be asked are: “What are possible worlds in general?” and “What is the actual world in particular?” Metaphysical theorizing about possible worlds goes back at least to Leibniz, but the contemporary theorizing is pursued largely on two distinct fronts; possibilist realism and actualist representationism.