Each community was not closed in itself in its own villages where, some times, alongside the residential buildings there were silos for preserving food stuffs and places of worship such as the megalithic terraced altar at Monte D’Accoddi -Sassari, similar in shape to the ziggurats of Mesopotamia.
A megalithic scenario that blends with the environment is not be seen in the rows of sixty standing stones (menhirs) that converge on a sacred burial area of domed underground tombs at Pranu Matteddu-Goni.



The  menhir know as perdas fittas (fixed stone) Goni in the province of Cagliari are similar  to other megaliths found many parts of  northern Europe. 

They showed the way to the necropolis at Pranu Mutteddu. This one is olso a unique examples  of a Sardinian  cromlech , the Welsh term for a tomb carved out of a large stone brought from another place.

 Erected  around ..3400 and thus  well before the nuragic period ,these monuments obviously requied the work of many hands to haul heavy  blocks over the rough ground and are presumably the expression of a hierarchical tribal society.
The religious practices, of a naturalistic-animistic religion, an organic part of the rural word, led to the development of artistic production in ceramic and stone: ceremonial themes were engraved on polished  ceramic substance, or it was used to model free-standing male female figurines.
With stone they produced  highly abstract, almost ethereal images of the Mother Goddess in a style similar to that of the little idols found in the regions of Anatolia and the Aegean, hinting at trading activities and specific roles in the agricultural society of which these same images are an allusive expression.
  There was a considerable  civil evolution  in the Copper  Age (2400-1800BC), characterised by different  aspects of material culture , perhaps indicative of communities of a different stock , but all distinguished by their use of metal ( copper, lead, silver, gold) which their had only come to know in the previous phase of the Neolithic. 

As a result there was  a further development of megalithic constructions, with the erection of collective burial places (one hundred and forty simple  and elongated dolmens) and of cromlechs, circular structures surrounded  by artificial or natural menhirs, whith have been interpreted 

as an astronomical observatory a calendar of the monthly  phases of the sun and moon, revealing the variation of the season and the agricultural cycles connected with them: examples are to be found at Monte Baranta –Olmedo, Hiriai-Oliena, Circuitus-Laconi. The first fortification appeared. The mark a turning  point in the sense that being built of reasons of defence  and control they presuppose the existence of political and military leaders belonging to a dominant class of worriors, necessary for the cohesion of the communities  which had become aggressive.
There were the first form of accumulation of wealth and specialisation of roles , while craftsmen were particularly actives in the field of metallurgy. Great armed menhir statues of stone, found in the central regione of Sardinia , representing heroic ancestors , illustrate this socio-cultural change , contemporary and not with  out contracts with the ways of life and behaviour of other ethnic groups in the Mediterranean and above all in the European world.