This documentary has the ability to restore access to history that has not been easily accessible to most fellow Americans and that needs to be reviewed. The history of the coal mining industry certainly provides context to many everyday issues facing ordinary citizens in every industry not just here in the US but worldwide. It shows how battle lines are created so we go against our fellow citizen, not just here in the US but with other ordinary citizens in other countries. It exposes how agreements (trade, policy, health care etc.) that are signed by most politicians are just enhancing divisiveness among fellow citizens. If you are politically astute it also explains mot just why and how Donald Trump got elected but for that matter how many politicians get elected.