Zinn's reputation among historians: not all that great.
Think of how difficult it is today to get even remotely truthful news. And then think about how this horseshit will be written up by government funded historians once all the political scores are settled and winners are determined
(* some of which comes from other parts of the US Govt meant to keep tabs on certain other parts of the US Govt) (*granted, also this assumes the US Govt is one monolithic entity when it is anything but)
It annoys me to no end that both right wingers and left wingers like so much to tell history how it's convenient to them and always hard to get something unbiased. Even numbers of deaths can't be trusted before you check who you are reading.