Perdigões in Portugal, a complex of circular earthworks, burials, and buildings.
Anyway I undertook this exercise because of more news from paleogenetics concerning the population history of this region. What the new studies show is that the people of this Copper Age culture were all natives of Neolithic Europe, their genes mostly those of farmers who migrated from Anatolia, who interbred with the Mesolithic inhabitants of the regions where they settled.
As I said, the culture of the Iberian Copper Age throve down to around 2500 BC. Then it started to fall apart; many sites were abandoned, others shrank, and the distinctive cultural expressions fade out. When we again see impressive monuments in this region, after 2200 BC, they are part of quite different cultures of the Bronze Age; for example we see many more fortified towns full of buildings with stone foundations. In Southeastern Spain the early Bronze Age culture is called El Argar. The genetics of these people are quite different. They show considerable steppes ancestry, the genetic signature of the Indo-European invaders. As usual, the change is even more profound on the male side; the available male skeletons are 100% Indo-European in the Y-chromosome line. These skeletons are mostly or entirely from the elite. So we see that the elite men of Bronze Age Spain were entirely descended from invaders in the male line. The men were often buried with swords, so these were the sword-wielding aristocrats who would dominate Europe for the next 4,000 years.
An interesting detail is that the paleogenetics also turned up signs of people from the eastern Mediterranean, a thousand years before the first known Phoenician settlements in the region. Trade goods from Italy and perhaps Syria have also been identified. The Mediterranean was to some extent a connected world even before the first real sailing ships.