What event led to the movement to improve work place safety?

The catastrophic Triangle Shirtwaist Factory fire in 1911 in New York City was a pivotal event that spurred the movement to improve workplace safety. The tragedy resulted in the deaths of 146 workers, mostly young women, due to inadequate safety measures and locked exits. This incident highlighted the dire need for labor reforms and led to increased public awareness, ultimately resulting in stricter safety regulations and labor laws to protect workers in various industries.