HBR IdeaCast

How much does a leader actually matter to an organization’s success? We tend to credit CEOs, founders, and other powerful figures with shaping the institutions they lead, but historian Jared Diamond argues that we often underestimate the role of timing, circumstance, industry, and plain luck. Diamond explains his “Hamlet test,” which asks whether someone else could have achieved the same outcome or whether the leader was uniquely qualified to do it, and how it applies to many business leaders. He also explains why some leaders are able to seize a fleeting moment of opportunity, why founders can have an outsized influence on institutions, and why boards may overestimate the impact of replacing a struggling CEO. Diamond is author of Prophets, Profits, Coaches, and Kings: (When) Do Leaders Matter?

In today’s increasingly decentralized workplaces, leaders often need to get things done without having direct authority over the people they depend on. So how can you influence colleagues, clients, vendors, and even senior executives without simply telling them what to do? Pamela Meyer, founder and CEO of Calibrate, says the answer is learning to read the room—and understanding the informal networks, emotional dynamics, and hidden sources of power that shape decisions. She explains five paths to indirect influence: becoming an influence spotter, a backchanneler, a precision mover, a connector, and a pulse reader. Meyer also explains why the best influencers focus less on how they’re performing and more on what the people around them need. Meyer is the author of How to Read the Room: The Art and Science of Social Observation and the HBR article “Five Ways to Wield Influence When You Lack Authority.”

People are living longer, healthier lives than ever before. But many of our assumptions about executive careers—from climbing the corporate ladder to retiring at 65—haven't caught up. London Business School professor Lynda Gratton says we need a new way of thinking about work and life, and argues that traditional career paths are giving way to more flexible, multi-stage journeys that require greater personal agency, continuous learning, and a long-term perspective. She explains why leaders should think of their lives less as a ladder and more as a fabric they actively weave over time, and offers up practical advice for balancing productivity and personal well-being, preparing for career pivots before they're necessary, and developing the skills that will matter most in an AI-powered future. Gratton is the author of the upcoming book Living the 100-Year Life: How to build a career that lasts and a life you love.

Companies often build products for wealthy markets first and then try to adapt them for the rest of the world. But according to Dartmouth Tuck professor Vijay Govindarajan and MIT professor Amos Winter, designing for the toughest constraints first—whether that's affordability, portability, or limited infrastructure—can lead to products that perform better everywhere. They explain how leaders can identify high-impact opportunities, uncover customer needs through deep field research, and design solutions that balance performance with cost. They also discuss why organizational mindset—not technology—is often the biggest obstacle to global innovation, and where AI can (and can't) accelerate the design process. Together they wrote the book Global by Design: How to Create Innovations That Scale, Travel, and Transform.

In an era of constant disruption, successful turnarounds require more than a new strategy—they demand a new culture. Dan Schulman, former CEO of PayPal, came out of retirement to tackle the challenge of taking over the helm of Verizon as it entered the AI age. He explains how they needed to put customers—not engineering—at the center of the business, how he reshaped company culture, and what it really took to prepare employees for an AI-native future. He explains why leaders need to embrace change, invest in reskilling, and balance optimism about AI with honesty about the disruption it will bring.