Write about one or two metaphorical fences you observed the characters build or grapple with and then tear down. Why and how was the fence built?

Much of Fences is dedicated to the literal and figurative building of fences. By the end of the play, the fence around the Maxson home is complete, but many of the figurative fences that existed between characters and worlds have been torn down. Write about one or two metaphorical fences you observed the characters build or grapple with and then tear down. Why and how was the fence built? What causes the fence to crumble?