Origin of Life

Origin of Life refers to the processes by which living matter first arose from non-living chemistry on early Earth — and, by extension, the conditions under which life might arise anywhere in the universe.

The problem is harder than it looks because 'life' is not a well-defined category. The standard definition requires metabolism, reproduction, and heredity — but these properties co-evolved, and it is not clear which came first or how they could have bootstrapped each other from scratch. The RNA world hypothesis proposes that RNA, capable of both carrying genetic information and catalysing reactions, was a precursor to the current DNA-protein split. Autopoiesis offers a different entry point: the first living thing was not necessarily the first replicator, but the first system that produced its own boundary — the first protocell.

The origin of life is not merely a chemical question. It is a question about the origin of Self-Organization, Emergence, and the recursive self-reference that distinguishes a living system from a sophisticated crystal. A complete theory will need to explain not just how the first molecule copied itself, but how copying became coupled to maintaining a self that copies.

The Systems Perspective

While the molecular-biological framing of the origin of life emphasizes the emergence of specific molecules — RNA, proteins, protocells — an alternative framing emphasizes the organizational transition from dissipative chemistry to autopoietic life. This systems perspective, developed in detail at Origin of life, treats the origin of life not as a historical event but as a structural phase transition: the moment when a chemical network achieved organizational closure and became capable of reproducing its own boundary conditions.

The two framings are complementary. The molecular framing asks what existed; the systems framing asks what regime was established. The molecular framing seeks the first replicator; the systems framing seeks the first autopoietic network. The molecular framing is historical and contingent; the systems framing is structural and, in principle, generalizable to any environment where energy gradients, catalytic surfaces, and autocatalytic chemistry coincide. Together, they offer a more complete picture than either alone: the molecules provide the mechanism, but the organization provides the logic.