This book will serve to end the longstanding confusion and debate on quantum mechanics. Using the picture of elementary particles and interactions provided by the Standard Model, it starts by analyzing the physical meaning of the Schrödinger equation, discovers the physical assumptions and consequences implied by quantum theory, and naturally and intuitively explains quantum entanglement and other confusing quantum concepts such as wave-particle duality and quantum eraser experiments. The book shows that the objectivity of reality is not a simple yes-or-no question.