Non-Being in Ancient Thought is the first book-length study of the concept of non-being in ancient philosophy. Dmitri Nikulin argues that non-being is a central concept in philosophy, but has been neglected for far too long. He demonstrates that non-being is central for the constitution and understanding of being: without non-being, being can neither be nor thought. The philosophical investigation of non-being is therefore necessary for the understanding of being and crucial for reappraising its place in philosophy.