Through the analysis of idealistic arguments and evidence from physics, it will be demonstrated that monistic idealism has a great deal of explanatory power as a metaphysical system for the reality that one experiences. Some of the arguments that support this claim include the inadequateness of Cartesian matter, the seemingly infinite divisibility of atoms, matter being reducible to sensations, the unnecessary aspect of matter, and simplicity. Evidence from quantum physics includes such factors as the necessary role of an observer in (...) the collapse of a quantum wave function and the element of nonlocality. Psychological experiments including nonlocal communication, the power of mental force, and the placebo effect further justify the case for monistic idealism. (shrink)