This article is the second in a two-part series on chronic pain and the prescription opioid crisis. Part one argues that chronic pain is not a given, it's a public health catastrophe. Read it here.
As more and more workers were injured by repetitive motion, and filed complaints, unions like the (US) AFL-CIO negotiated for ergonomic improvements to their workplaces. Some employers recognized that inefficient workplaces caused the workers' injuries.