Alfredo said:
As far as 'our' doctrine about the decadence of capitalism is concerned, it's just Marx's idea that all forms of class society have reached a point where their continued existence becomes a barrier to human progress. Capitalism is no different from Ancient Rome or feudalism. Numerous revolutionaries saw the first world war as a clear indication that capitalism had reached this point. Some of them also noted that the previous organisations of the workers - the social democratic parties and the trade unions - helped the various capitalist states march the workers off to war, and from that point on they ceased to be workers' organisations.
1. There are two senses in which capitalism might be claimed to have become a 'fetter' (as Charlie M said) on development: (a) an absolute fetter on development or (b) a fetter compared to another superior way of organising production and distribution.
(a) It would clearly be bonkers to claim that there has been no development of the productive forces since 1914, so I assume, for the moment, that that's not what you are claiming.
(b) Instead, I suppose you mean that there could have been far superior development of the productive forces if capitalism had been replaced by communism at any time since 1914. That might even be true. The trouble is that we cannot know. It's just guessing about a history that has not happened.
2. Trade unions clearly are workers' organisations. By all means, disagree with this or that policy or propose more fusions (or fewer) or reforms to TU constitutions - but to claim that TUs are not workers' organisations just strikes me as bonkers. Sorry, Alf, but I've got to be blunt about this.
I wonder if you and other members of the ICS advise unionised workers to leave their unions.
IIRC, from the time when I used to read ICS and similar material, your real objection to TUs is that they are not revolutionary and even unions that think they are revolutionary are not the right sort of organisation to make a communist revolution. Most trade unionists would agree, of course, but then as I expect you've noticed most workers (in or out of TUs) are not about to make a communist revolution.