I have to say this was a particularly weak and feeble very short article by Adam Buick. He makes a series of claims and assertions which are just plan wrong each time. I would just strike most of the comments through with a red pen and say "incorrect", "wrong" or "no".

The question for the SPGB is quite simple. Do you not accept that a small numbers of capitalist states are so powerful they can effectively dominate and subordinate the majority of weaker and smaller capitalist states?

The answer has surely to be "yes", that is a simple fact and reality. The explanation and understanding of how and why this has come about lies in the theory of imperialism. That capitals from these metropolitan capitalist centres has been exported and invested in the subordinate states so as to subvert, distort and dominate their economies, and this is backed up by overwhelming military power by the imperialist states, funded by the profits from such export and investment of capital.

Or does the SPGB really believe that all capitalist states are equal and compete with each other on equal terms? Surely not.