Sequence of origin of life Free atom $\downarrow$ Origin of molecules and simple inorganic molecule $\downarrow$ Origin of early organic compounds $\downarrow$ Origin of simple organic compounds $\downarrow$ Origin of complex organic compounds $\downarrow$ Origin of coacervates like droplets $\downarrow$ Eobionts $\downarrow$ Prokaryotes $\downarrow$ Eukaryotes