An expert discusses how large companies can decide whether to focus or diversify. While academics have advocated focusing on core competencies and synergies, these concepts often fail. Instead, companies should focus on their purpose, values, decision-making processes, and execution abilities. If a company relies only on domain experts, diversifying may not work, but generalist companies that avoid single points of failure should diversify as much as possible to innovate, exploit opportunities, and utilize resources efficiently. The key is specializing areas of focus while diversifying overall.