What do megaliths imply about the northern european civilizations that built them?

The Northern European Civilizations built the megaliths and it definitely signifies a lot of things. It signifies that the people living in that age had good specialization as far as economics is concerned. The number of workers involved was huge in number and they were also dedicated towards the work they did. They also had immense faith on the God they believed in. Stratification is one thing the North European Civilization definitely did have. A megalith is actually a huge sized stone from which a monument or a structure has been built.