To summarize, we have conducted a comprehensive modeling study of singlet exciton diffusion in conjugated polymer nanostructures. Our calculations show that long-range interactions along the fibers prompt diffusion coefficients ( cm 2 /s) conducive to the full usage of the singlet excitons photogenerated across the absorption light depth in organics. Such long-distance effects are characteristic features of conjugated polymers showing extended on-chain -conjugation, as those prepared using living crystallization. In the spirit of Reference 32, what matters to ensure long-range energy migration in these nanostructures relates more to the shape of the Hamiltonian than to the strength of the interactions. As a matter of fact, our excitonic Hamiltonian retaining the full range of interactions is intermediate between the nearest-neighbor one-dimensional model for charge transport and the star-like graph pertaining to polaritons, with the latter providing ensemble properties that are more robust to disorder than the former (i.e. more prompt to exciton delocalization thanks to reduced von Neumann entropy) . Exciton delocalization along polymer chains somehow "redistributes" the total excitonic interactions among shortand long-range intermolecular contributions in a way that is favorable to energy migration between chains, the weak distance dependence of the excitonic interactions in the -extended polymer chains offering multiple efficient pathways for long-distance energy migration. The resulting energy transport regime can be viewed as a generalized variable range hopping