This book presents a critique of the theory of evolution from a biochemical perspective. The author argues that complex biochemical systems within the cell, such as blood clotting and vision, could not have evolved gradually through natural selection because they are "irreducibly complex" - all parts must be present and functioning for the system to work. He proposes that such systems must have been deliberately designed, introducing the concept of "intelligent design" as an alternative to Darwinian evolution.

"Life Ascending" explores the remarkable and diverse mechanisms that have shaped life on Earth, from the origins of life to the evolution of complex organisms. Nick Lane delves into the fundamental questions of biology, unraveling the mysteries of how life emerged from the primordial soup and how it has evolved over billions of years. Through captivating storytelling and scientific insights, Lane takes readers on a journey through the intricate web of life, revealing the extraordinary adaptations and innovations that have allowed organisms to conquer new environments and thrive in the face of challenges.