There were difficulties in organizing the congress, and the largest syndicalist union worldwide — the CGT — refused to participate because it was already affiliated with the social democratic International Federation of Trade Unions.
Ganska snart dök svårigheter upp med organiseringen av kongressen, och den största syndikalistiska fackföreningen i världen, CGT, vägrade att delta eftersom den redan var ansluten till den socialdemokratiska International Federation of Trade Unions.