During the PPNA and PPNB (10th to 8th mill. cal. BC) lithic technology got more and more complex. This process shifted by the end of the PPNB and during the PN (7th mill. cal. BC), when expedient technologies were preferred. This evolution cannot be exclusively explained in economic terms. We would rather look for an explanation of this technological evolution within the social and mental changes that took place among Neolithic groups, changes in which technology certainly played an active roll.MEC Plan Nacional:BHA2003-09685-CO2-01 IPHE, Excavaciones en el ExteriorPeer reviewed