The explanation of South-West Prehistory experienced substantial changes when multidisciplinary techniques were incorporated in its research, which apart said new explication from a traditional historical interpretation based exclusively on classical texts. The importance of eastern sailors and colonists is mainly tinted and also it seems necessary to demonstrate which role was played by the local society, especially as from the middle of the first millennium BC. At that time, Western Society, including local and newcomers descendents, was formed by more or less homogeneous groups related together to the production and international commerce distribution of marine resources obtained in sites located in the Atlantic coast, between the Cape of St. Vincent in Portugal and the Cadiz bay in Spain, being the later the capital of the so named 'Cadis League'. It is understand that as from ca. 237 BC Carthaginian invasion did not produce large changes in the fish productions and their international commerce systems, but after Second Punic War some physical changes seems to be almost traumatic although they did not affected the continuity of the whole system along the further roman Republican period. In that case, if the physical destructions are evident as also are roman pacific continuity of coastal sites, it is possible to ascertain than an EWE dated 218-209 B.C. could be responsible for above physic collapses and not a result of the war, always in accordance with documented evidence obtained in some of the coastal sites, in contrast with the normal continuity observed on synchronic inland sites.