Does This Ontological Commitment Make Me Look Fat? A Defense of Many-Worlds

The Everettian or Many-Worlds formulation of quantum mechanics features the simplest and most straightforward set of concepts and equations, but comes at the cost of the non-uniqueness of our observed part of reality. I will give a brief introduction to this approach, and discuss both a set of misguided objections and some true challenges. Among the true challenges are the issue of structure (how do complicated aspects of observed reality emerge from an austere vector in Hilbert space?) and probability (why are probabilities given by amplitudes squared if every outcome happens on some branch of the wave function?).