The study "The Changing Ranks of Corporate Leaders" reveals that from 1980 to 2021, Fortune 100 leaders have become more diverse and experienced, reflecting shifts in industry focus and business scope. Key changes include increased diversity, shorter tenures, and broader backgrounds in finance and technology. Modern leaders face new challenges including geopolitical risks, health and safety, AI governance, skill shortages, and managing volatility, requiring a long-term stewardship approach.