Whis is the cool part about Wikipedia: someone with knowledge and no ego can edit out the dross. Perhaps the political content will improve over time...
I'll toss my hat into the ring with those praising the historical content (vs. hysterical
) As hinted by my username, my fields of study are philosophy/theology/psychology. The articles on these are very good - with important professionals in those fields contributing at least some of the content.
A good illustration of Wikipedia's strengths & weaknesses coinciding is the article on the Ghost Town & Calico Railroad. While generally well written from a style standpoint, it is also inaccurate in its historical details.