A simpler origin for life

Theories of how life first originated from non-living matter fall into 2 broad classes-replication first, in large molecule capable of replicating, such as RNA formed by chance, and metabolism first, in which small molecules formed and evolving network of reactions by and energy source. Replicator-first theorists must explain how such a complicated molecule could have formed before the process of evolution was under way. Metabolism-first proponents must show that reaction networks capable of growing and evolving could have formed when the earth was young. Energy-driven networks of small molecules may be more likely first steps for life than the commonly held idea of the sudden emergence of large self-replicating molecules such as RNA.