The behavior-based safety concept was developed by H.W. Heinrich in the 1930s and 1940s. Heinrich researched hundreds of insurance reports and concluded that almost 90 percent of industrial accidents could be blamed on employees, or “man failure”. Based on his findings, Heinrich determined that workers who were causing accidents could have inherited certain traits causing them to be more accident prone. The only way to correct the problem was to observe and change worker behavior. The premise was simple, but resulted in blaming the employee for accidents and not necessarily considering other contributing factors.