By Sheila Barth
Some things never change.
We say they do. Over the years, we claim, there have been sweeping, amazing, changes.
But people don’t change. Sadly, there’s a stagnancy in human nature and conditions. Such is the case with Christopher Sergel’s striking stage adaptation of Harper Lee’s classic 1960 novel, “To Kill a Mockingbird,” with Gloucester Stage’s blended cast of outstanding professional and local actors, skillfully directed by award-winning Boston director-Boston University educator, Judy Braha.