For some time now, I've been pretty firmly convinced that the many worlds interpretation is the most likely. I know that back as an undergraduate, I vehemently objected to this interpretation on grounds that it seemed like it violated all sorts of things about how we understand the world to behave, most especially every conservation law in existence. Since then, I've felt rather disappointed that we never covered decoherence theory (at least not that I remember) in quantum mechanics class. And I've come to realize that once you throw decoherence into the picture, the many worlds interpretation becomes so blatantly apparent that it must, in a sense, be true. That is to say, if you just take a simple system, such as the two-slit experiment, and consider the mixed state interacting with a more complex system, the destruction of the interference pattern necessarily occurs. What this means is that the wave function is now composed of two components that, at least on short time scales, cannot interact with one another. The interaction causes an occurrence which mimics wavefunction collapse! After recognizing this, I have always thought it patently absurd to add anything at all to the wave function dynamics of quantum mechanics. As those wave function dynamics alone explain the appearance of collapse, why should we think that there is any other physical process at work? Sure, taking this view of quantum mechanics leads to some rather unsettling consequences, and it's not an easy task to determine all of the predicted outcomes that observers who are described by quantum mechanics will observe. But just this schematic example alone was enough to convince me that this seems, by far, the most likely interpretation of quantum mechanics.