Trying to do this in brief, if no response, I probably agree with you:
Diversity: actually, I agree with you. I thought the manifesto was simply to idealistic on this point.
Alternate solutions: if you're gonna state you have 'em, show 'em.
Communism & the anti-global guys: you are right. There are multiple movements. I'm busting on THIS one. And yes, liberal/ capitalist thought is an old movement, and imperfect. But it gives people IMO a whole lot more options than doing what the government tells you.
Environment...the big bugaboo here. The idea if we don'd do something RIGHT NOW we won't be able to repair the planet is patently false. Human -- and specifically industrial -- influence on the environment is an eyeblink in geological time. The planet's self-equilibrating. 50 years, a 100 years...too short to say definitively this ins't mostly natural in occurance. And if that's the case, there ain't much we can do.
War and the big bad military complex. Most of these guys would still be fighting without the military companies. BUT....I agree, there are other products they could be making that might be more useful. I've seen conflict up close and personal. I wouldn't mind if it was stopped. But I'm not optimistic.
Actually, dude...I think the IMF is the devil. But if you're stupid enough to deal with the devil, I place the blame on you (not YOU), not the guy with the horns.
"You take for granted people would want to live in such a system..." Yup, I do. I know I'm wrong, but my life philosophy is suceed and fail on your own merits. I don't take financial aid for school. I have no interest in the government takeing care of me. I prefer self-reliance.
Asian sweatshops -- I'll rephrase, most Western countries do not allow slavery or servitude. As for the Asian sweatshops...the promblem is the governments in those regions (and why, I would suggest, many people try to flee TO the West.)
"War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."
John Stuart Mill