WHEN IN 1879, MARX RECEIVED TWO COPIES OF THE ABSTRACT OF CAFIERO AT HIS HOME IN LONDON, HE HAD EVERY REASON TO BE SURPRISED BY THEIR PROVENANCE, BECAUSE IF THE AUTHOR WAS ONCE THE EMISSARY OF THE GENERAL COUNCIL IN ITALY, HE VERY QUICKLY BECAME ONE OF ITS FIERCEST OPPONENTS. THIS WILL NOT PREVENT MARX, ACCORDING TO HIS DAUGHTER LAURA, FROM CONSIDERING “CAFIERO’S WORK AS A VERY GOOD POPULAR SUMMARY OF HIS THEORY OF SURPLUS VALUE”.