The creation of some sort of typical or shared French culture or "cultural identity", despite this vast heterogeneity, is the result of powerful internal forces – such as the French educational system, mandatory military service, state linguistic and cultural policies – and by profound historic events – such as the Franco-Prussian war and the two World Wars — which have forged a sense of national identity over the last 200 years. However, despite these unifying forces, France today still remains marked by social class and by important regional differences in culture (cuisine, dialect/accent, local traditions) that many fear will be unable to withstand contemporary social forces (depopulation of the countryside, immigration, centralization, market forces and the world economy).