Archaeologists' discovery of stone age family burials in europe was sociologically significant because

The reason why the discovery of Stone Age family burial sites in Europe is significant is because cultural practices towards the dead can tell us a lot about the type of humans that existed at the time. It can tell us whether these people were capable of abstract thinking, and also whether they understand the inevitability and irreversibility of death

Family burials in particular can also provide evidence of social hierarchies. The Neolithic burial chambers found in England show that the bones of the dead were used to mark social and family allegiances. Finally, some burials, like that of El Sidron in Spain, show signs of violence in the bones, and the family buried there showed severe signs of malnutrition. This had led scientists to believe that cannibalism, whether for nutritional or ritualistic purposes, was practiced.