In Part 1 of this article, the legal and scientific origins of the concept of psychological safety are examined as background to, and support for, the new Canadian National Standard on Psychological Health and Safety in the Workplace (CSA Z1003/BNQ 9700). It is shown that five factors influencing psychological safety can be identified as being common to both legal and scientific perspectives: job demands and requirements of effort, job control or influence, reward, fairness, and support. This convergence of evidence from legal and scientific perspectives creates a powerful case for the development of a national standard built around these five factors. In Part 2, it is proposed that the introduction of a national standard can be expected in the long run to have positive social benefits since the health or harm that is generated in the workplace does not remain there but migrates into families, communities, and society at large in the form of either social capital or social exhaust. Consequently, psychological safety is a concept that connects the dynamics of the workplace to the health, resilience, and well-being of society at large. (Contains 3 figures and 27 notes.)