“…This crop is well adapted to the Mediterranean climate and was easily threshed and stored as clean grain, but it is also often attacked by insect pests, who fed from the grains without hulls. After a long period of stability of the crop assemblage in the area, certain authors suspect an influence of a series of stress factors after 4000 B.C., such as an increase of soil erosion due to anthropogenic or natural fires, global cooling, hydrological oscillations, and periodical flooding [ 12 , 13 , 14 , 15 , 16 ], coinciding with an apparent regional demographic decline (observed in southern France) [ 17 , 18 ]. These factors appear to have yielded an agricultural model where glume wheats gain in prominence [ 3 , 12 ].…”