As the CEO of Pfizer, Albert Bourla led the team behind one of the most consequential medical breakthroughs of the modern era: the COVID-19 vaccine that saved millions of lives.
Yet the leadership mindset that guides Bourla as he runs a nearly $150 billion pharmaceutical giant isn’t just about science or strategy. It’s about psychology—specifically, balancing optimism with realism.
“The optimists have the vision,” Bourla said on the Fortune 500: Titans and Disruptors of Industry podcast. “The pessimists land you to reality and help avoid pitfalls.”
In other words, the top executive doesn’t see optimism and pessimism as opposing forces but rather as complementary—each playing a distinct role in effective leadership.
“Pessimists are usually right,” he told Fortune Editor-in-Chief Alyson Shontell. “But nothing great on this earth has been accomplished without an optimist behind it.”
