What does it take to lead one of the most beloved companies in the world through a period of massive disruption? For 15 years, Bob Iger steered the Walt Disney Company, overseeing monumental acquisitions and unprecedented growth.In today’s 5-minute briefing on his incredible memoir, “The Ride of a Lifetime,” we explore the single most important principle that guided his leadership. Discover why Iger believes optimism is the first and most crucial quality of any great leader.