This book investigates the historical and philosophical endeavor to derive physical laws and theories through pure reason rather than empirical observation alone. Olivier Darrigol, a historian of science, examines the evolution of rationalist methodology from the 17th century to the modern era. He analyzes how thinkers have attempted to construct physical reality from foundational axioms, tracing the intellectual lineage from Cartesian geometric world-building to contemporary efforts to formalize quantum mechanics.

Scholars and historians of science recognize this work as a rigorous examination of the intersection between philosophy and theoretical physics. Readers frequently note the academic density of the prose, which requires a strong background in both the history of science and physical theory to fully appreciate the author's arguments.