The recent return of samples from carbonaceous asteroids provides first insight into early Solar System prebiotic evolution from known planetary bodies. Asteroid 162173 Ryugu samples are CI (Ivuna type), the most water- and organic-rich chondritic material, composing mostly of phyllosilicate. This phyllosilicate surrounds micron to submicron macromolecular organic particles - insoluble organic matter. Alteration on 162173Ryugu evolved insoluble organic material into organic particles aromatic-richer than what is found in the lesser altered carbonaceous chondrite matrices, consistent with CI and type 1 carbonaceous chondrites. Wider-spread diffuse organic material is also preserved within the phyllosilicate, aliphatic-, carboxylic-richer and aromatic-poorer than the organic particles. This diffuse organic material is probably a mixture of both acid insoluble and solvent soluble organic molecules. Carboxyl/aromatic ratios in the diffuse organic matter of Ryugu are also characteristic of CI and type 1 carbonaceous chondrites, indicating the role of aqueous alteration in its formation. Some organic particles additionally evolved to completely surround phyllosilicate itself, meaning that the soluble organic bearing diffuse organic matter is contained within some of the macromolecular organic particles by aqueous alteration on Ryugu. Earth therefore was, and currently is, delivered micron-sized polymeric organic objects encapsulating biologically relevant molecules.