This document discusses the importance of psychological safety in the workplace. It notes that 1 in 5 Australians experience mental health issues and these issues cost Australian businesses $10.9 billion annually. Creating psychologically safe work environments where employees feel comfortable sharing ideas without fear of criticism or punishment can lead to significant benefits such as reduced turnover and safety incidents as well as increased productivity. The document recommends measuring psychological safety using tools like the PS25 assessment and prioritizing leadership programs and policies that foster psychological safety and employee well-being. Investing in these areas can provide large returns on investment through increased productivity, reduced costs, and improved business results.