What is Reality – Are We Just Part of a Simulation? Since Plato's inquiries into the nature of existence, one question has continued to fascinate humanity: the nature of reality. From René Descartes' radical doubts to Daniel Dennett's "illusionism," which challenges the very concept of consciousness, groundbreaking ideas have shaped our understanding of what is real. George Berkeley's subjective idealism and Albert Einstein's revelations redefined space and time, paving the way for a compelling modern scenario: Are we living in a simulation? With the advent of exponential technology, the prospect of simulating the universe using quantum computers has become central to this debate. Could our reality be part of a chain of simulations? Anders Indset and Florian Neukart explore this question, shedding light on the profound implications such a scenario would have for our understanding of existence, theology, and the destiny of the cosmos. A book that masterfully combines science and philosophy into a gripping intellectual journey.