Dave Rensin, Google's Senior Director of Engineering, presented at Chaos Conf 2019, discussing the application of Chaos Engineering principles to human systems within companies. He emphasized that as companies grow, they become large distributed systems with emergent properties, often rooted in human behavior rather than technology. Rensin proposed a series of experiments to identify and address these properties before they cause major issues, suggesting methods such as 'The Wheel of Staycation' to uncover information silos and 'Liar Liar' to test the reliability of information flows. He argued that simulating catastrophic events, like a major security breach, could help organizations prepare for real crises. Rensin highlighted the importance of cross-functional collaboration and the need for a proactive approach to prevent bad luck, advocating for a fun and human-centered approach to Chaos Engineering in companies.