Page "Bolshevik" Paragraph 8

The two had disagreed on the issue as early as March – May 1903, but it was not until the Congress that their differences became irreconcilable and split the party.

Although at first the disagreement appeared to be minor and inspired by personal conflicts, for example, Lenin's insistence on dropping less active editorial board members from Iskra or Martov's support for the Organizing Committee of the Congress which Lenin opposed, the differences quickly grew and the split became irreparable.