in order to help it or to hasten its development, in the right direction, they may do a deal of good and play a decisive part in it: if they stand aloof, they will dwindle down into a dogmatic sect, and will be brushed aside as people who do not understand their own principles."
The problems of the mass party and of its relation to the trade unions, is dealt with by Engels in close connection with the, at that time, equally acute trade union problem in England. In his letter to Sorge dated December 7, 1889, he reminds the American socialists of the Hyndman Social-Democratic Federation in England—which should serve them as a warning—which was "Marxist," it is true, but which became a sect in consequence of its fanatic aversion to the trade union movement:
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