Which report is recognized for initiating modern day EMS development?

The report that is recognized for initiating modern-day EMS development is "Accidental Death and Disability: The Neglected Disease of Modern Society," published in 1966. This pivotal document was one of the first comprehensive analyses of the state of the emergency medical services and trauma care in the United States. It highlighted the inadequacies in the pre-hospital care system and called attention to the urgent need for improved emergency medical services.

The report led to significant changes in policies, funding, and the overall structure of the EMS system. It pushed for the establishment of trained emergency medical personnel, standardized training and protocols, and advanced the use of technology in emergency situations. As such, it laid the groundwork for the development and expansion of EMS as a critical component of the healthcare system, influencing legislation, public policy, and the establishment of formal EMS training programs across the country. This marks it as a foundational document in the history of emergency medical services.