Translate the following English sentence to French:
"Social security and protection are among the greatest acquisitions of working people in Europe, and were achieved after many years of battling against the aspirations of big business, and by the constant expression of the solidarity that characterises working people."
La protection sociale constitue l' une des conquêtes majeures des travailleurs en Europe, arrachée après des années de lutte contre les desseins du grand capital et grâce à la manifestation constante de la solidarité qui caractérise les travailleurs.