The paper in this volume challenge the concept of form and aim to set out, explore and develop different theories and examples of ‘the formless’. In so doing, they raise questions of form, and notions of formlessness (as distinct from something called ‘the formless’). The starting point for many of the contributors is Georges Bataille’s highly influential article entitled ‘informe’ (‘formless’). Here, in a context where art, philosophy and anthropology were merging, Bataille tried to question the idea of formlessness as simply applying to things without form. This book, through a diversity of articles in various domains, asks how and why ‘the formless’ is such a dominant idea from the nineteenth century onwards and it asks the question: ‘what is formless?