The third millennium BCE is a highly dynamic period in the prehistory of Europe and western Asia, characterized by large-scale social and political changes. In the Iberian Peninsula, the Copper Age was in full swing in around 2500 years BCE with substantial demographic growth, attested by a large diversity of settlements and fortifications, monumental funerary structures, as well as ditched mega-sites larger than 100 hectares. For reasons that are still unclear, the latter half of the millennium experienced depopulation and the abandonment of the mega-sites, fortified settlements and necropolis.
Click here for original story, Genetic changes in Bronze Age Southern Iberia
Source: Phys.org