French and English text.\n\nArt, archaeology, genetics : Is transhumanism the most dangerous idea in the world? Marc Johnson, artist, architect and filmmaker is like the philosopher and the epistemologist, a researcher in constant search for knowledge and understanding of the world. Conceived as an art book, this publication demonstrates the working methods and the ambition of questioning what is fundamentally at stake in the world of today, and in the development and the future of humanity. More than a year of research dedicated to archeaology, during which the artist explored this discipline with the support of the Inrap. A science that, by crossing his research with the expertise of the most advanced disciplines, in particular genetics, sheds light on human history, questioning today and anticipating the future. This is precisely what the specialists, invited by Marc Johnson, highlight throughout their own experiences in this book. The anthropologists Rozenn Colleter - in collaboration with Paul-Anthelme Adele, jurist - and Eric Crubezy, illustrate today's impact on the analyses of relics of the past. Stefan Lorenz Sorgner, philosopher, reflects on the evolution of humankind. Having analysed the posthumanist and transhumanist movements, he argues for a \"metahumanity\". By presenting these texts alongside a selection of archaeological excavation photographs, sampled from the iconographic collection of the Inrap and images from the site-specific installation, Marc Johnson performs an original layout elaborated in sequences, visually acquainted with a research project. He tells a story which can only concern us, the story of humanity. Making sense as he questions us about our final outcome. [Valerie Knochel-Abecassis]