With what inimitable talent and skill in eliminating all partial disagreements and shades of differences among Economists does this clear and concise postulate express the quintessence of Economism: from calling to the workers to join 'in the political struggle which they carry on in the general interest, for the purpose of improving the conditions of all the workers,' continuing through the theory of stages, to the resolution of the Congress on the 'most widely applicable,' etc. '