Tourists, terrorists, secularists, hackers, fundamentalists, transhumanists, algorithmicians: in this book Roberto Calasso considers the tribes that inhabit and inform the world today. A world that feels more elusive than ever before.

Yet once contrasted with the period between 1933 and 1945, when the world made a partially successful attempt at self-annihilation, the new millennium begins to take on an unprecedented form. What emerges is something illusory, ever-shifting and occasionally murderous: the unnamable present.

This book, the ninth part of a work in progress, is a meditation on the obscure and ubiquitous process of transformation happening in societies today, where distant echoes of Auden's The Age of Anxiety give way to something altogether more unsettling.