What was Leninism?

This is an interesting clip from the question and answer period of a talk Noam Chomsky gave in 1989. The questioner, a member of the International Socialist Organization, challenges Chomsky on a comment he made about Leninism. This is the question and his response:

As an anarchist who believes in organization, I think it’s important to understand past attempts at revolution and learn from them. I think this clip provides some food for thought.