[karaterobot]

I am not the person you responded to, but I have read Zinn and yes, it is very obviously written with a bias. That is to say, not only does he have inevitable subjective bias that all historians have, he is very pointedly writing his book as a corrective. The book has many good qualities, but neutrality is not among them. This isn't a problem unless the people who read it aren't aware of that.