In the book "Ego Is the Enemy," Ryan Holiday emphasizes the importance of substance over style in leadership. He uses leaders like Bill Belichick and Angela Merkel as examples, illustrating how focusing on solid, effective strategies—referred to as "steak"—is essential for achieving success in sports and governance. These leaders understand that tangible results are what ultimately drive progress and victory.

Conversely, Holiday warns against the allure of "sizzle," which represents superficiality and distraction. He argues that when leaders get caught up in flashy appearances or ego-driven decisions, it becomes difficult to make sound judgments. Authentic leadership relies on prioritizing core values and clear goals over fleeting trends or popularity.