Family and founder CEOs had their heyday in the interwar period. They faced a highly volatile economic and geopolitical environment. The chapter shows how they responded to these challenges. CEOs such as Alfred Mond led his family company to become the chemicals giant ICI, and William Lever founded and grew consumer goods company Lever Bros. Skin in the game and roots in social groups outside the mainstream of British society gave many of the families and founders a set of values and a deep commitment to grow their companies. Through investment and innovation, they achieved scale and scope. Their success took some to the heart of government, where they reshaped competition policy. The chapter then goes on to show that families and founders were particularly challenged by succession issues. John Ellerman, the most successful entrepreneur of the era, found his son had little interest in his business empire. The succession trap led to the collapse of many family companies. Others survived by handing power to professional managers such as D’Arcy Cooper, who transformed Lever Bros. Families and founders declined in importance, but through their stewardship corporate giants were built.