When the European working class had recovered sufficient strength for another attack on the ruling classes, the International Workingmen’s Association sprang up. But this association, formed with the express aim of welding into one body the whole militant proletariat of Europe and America, could not at once proclaim the principles laid down in the Manifesto . The International was bound to have a programme broad enough to be acceptable to the English Trades’ Unions, to the followers of Proudhon in France, Belgium, Italy and Spain, and to the Lassalleans 1