Umberto Campagnolo, for many years General Secretary of the Société Européenne de Culture (Venezia), was Kelsen’s disciple, even though a clear distance from Kelsens’s « Reine Rechtslehre» characterizes his Toward a Federal Constitution for Europe left unpublished by the author and published only recently. Campagnolo believed that such a constitution wasn’t only absolutely necessary but possible as well. It was necessary since the two World Wars were European in their origin and reflected the failure to give peace to the world through the League of Nations and a more binding international law.And it is now also possible as the economic union has been built and the people may expect that what is now perceived as a far away bureaucratic body may be turned into a truly democratic federal collective body. Without a real participation of the European peoples with their different cultures, the European federal state will remain a tree.trunk with no life