摘要:AbstractIt is well known that founding documents of the EU do not contain any objective reference to the cultural-Christian tradition of the ‘old world’ – in spite of the sustained efforts of several Christian churches from Europe, peculiarly the Catholic one (through the Pope John Paul II himself). In an European society characterized more and more by discriminations and prejudices, superficiality and abusers, the necessity appears to recover the knowledge and awareness of fundamental ethic-social principles likepersonalismus, solidarity and subsidiarity.The present article put forward a qualified differentiation of the ‘term’ solidarity, followed by bringing into question some types of solidarity, as for instance those of the ethic-social, ethic-individual and legal-juridical areas. Debates go on from the points of view of the delicate balance between individual welfare and collective welfare, the moral-social responsibility of social actors, the human dignity, our social (in) competence as well as the time-space dimension. Conclusions suggest considering the social implications of solidarity principle within social-charitative area.