Before revision: Demic diffusion is a demographic term referring to a migratory model, developed by Luigi Luca Cavalli-Sforza, of population diffusion into and across an area that had been previously uninhabited by that group, possibly, but not necessarily, displacing, replacing, or intermixing with a pre-existing population (such as has been suggested for the spread of agriculture across Neolithic Europe and several other Landnahme events).
After revision: , as opposed to trans-cultural diffusion,Demic diffusion is a demographic term referring to a migratory model, developed by Luigi Luca Cavalli-Sforza, of population diffusion into and across an area that had been previously uninhabited by that group, possibly, but not necessarily, displacing, replacing, or intermixing with a pre-existing population (such as has been suggested for the spread of agriculture across Neolithic Europe and several other Landnahme events).