Translate the following English sentence to French:
"We have different traditions and there are differences in culture and, in spite of there being many points of similarity, there are also major differences between one country and another in the nature and extent of the social problems concerned. It is therefore important to emphasise that social policy is a national concern."
Nous avons des traditions différentes, des cultures différentes et malgré de nombreux points de ressemblance, le caractère des problèmes sociaux et leur ampleur divergent aussi considérablement de pays à pays.