"

 84.160.224.182 

I reverted additions by 84.160.224.182 for chronological and POV reasons.  84.160.224.182 mentioned the split between Bordiga and Damen in the 1950's paragraph, but it is previously descussed in the Italy and the 1920's section.  Which is correct? 
Also the POV introduced ""by the way Stalinism invented Leninism"" is too complicated to shoehorn in here.  "