Though 13th , the Academy Award-winning documentary by Ava DuVernay , premiered 10 years ago, I’ll suggest the movie is worth watching, and re-watching, for all of the reasons I state in my essay, “13th: A Tough Movie Worth Watching,” which I posted on my uniting Americans blog, VigilantPositivity . I’m posting a link on MLK Day, not because I think we should be laying blame. Instead, it’s an opportunity for our country to make positive change. I take my hat off to Ava DuVe

I’m grateful every day for the people who write about and promote ideas that are ultimately positive for our society and world, but are...