I think I agree with Chomsky that humans can create a much less hierarchical society. Most of what he advocates for (reducing American imperialism) is a pragmatic step towards giving people in the countries of the world more direct control over their lives. Would you say this is not possible? I don't think there's going to be a global revolution, but I do think we should strive to question hierarchy and increase human freedom wherever possible. I don't think we'll ever have a perfect society, but I do think we can create a much better society. Just look at all the progress made in the last decades.