Preface

The origin of life remains one of the most profound and challenging unanswered questions in modern science. Despite decades of research across chemistry, biology, geology, and planetary science, no single theory has fully explained how non-living matter transitioned into the first living systems.

This book examines the major scientific theories proposed to explain life’s emergence on early Earth. Rather than treating these theories as mutually exclusive explanations competing for a single answer, the book approaches them as partial explanatory frameworks that address different stages and mechanisms involved in the transition from abiotic chemistry to primitive biological organization.

Figure 0.1 presents the conceptual framework used throughout the book by mapping each theory to the scientific domain or transition it addresses most directly.

Conceptual map of major origin-of-life theories and their primary explanatory domains.

Figure 0.1: Conceptual map of major origin-of-life theories and their primary explanatory domains.