Efforts by the federal government to ensure workplace health and safety were minimal until the passage of OSHA. The American system of mass production encouraged the use of machinery, while the statutory regime did nothing to protect workplace safety. For most employers, it was cheaper to replace a dead or injured worker than it was to introduce safety measures. Tort law provided little recourse for relief for the survivors of dead workers or for injured employees. After the Civil War, some improvements were made through the establishment of state railroad and factory commissions, the adoption of new technology (such as the railway air brake), and more widespread availability of life insurance. But the overall impact of these improvements was minimal.