Doc roundup: ‘Will and Harper,’ ‘Join or Die’

Looking at two new documentaries.

There are few forms of cinema I enjoy more than documentaries, but there are also few forms of cinema I hate to review more. Documentaries are a vital part of our film diet, playing an important role as pieces of journalism or advocacy. And yet, they’re hard to write about. I don’t want to regurgitate information presented in the film, and unless they d…