Why do we observe phenomena that necessitate indeterminacy prior to observation? Why don't we notice quantum phenomena at scales similar to our own? How can we intuitively understand entanglement without hidden variables or faster-than-light communication? 'On Reality' represents an endeavour to answer these questions via a unification of quantum mechanics with Einstein's theory of special relativity. It provides an intuitive explanation for quantum superposition as a consequence of quantum entanglement, and of quantum entanglement as a consequence of Descartes' first principle. The resultant theory clarifies the hand-waving explanations of quantum mechanics that have dominated the past century and provides a clear philosophy that may act as a framework for future scientific investigations.