In "Fully Grown," Dietrich Vollrath embarks on a groundbreaking journey, challenging the conventional wisdom that equates economic growth with economic health. With a keen analytical eye, Vollrath dissects the narrative that a thriving GDP is the ultimate measure of prosperity, proposing a radical reevaluation of what it means for an economy to be successful. Through a meticulous examination of trends such as the shifting ratio of workers to population, the evolution from a goods-driven to a services-driven economy, and changes in geographic mobility, Vollrath argues that the slowdown in growth observed in recent decades is not a symptom of economic malaise, but rather an indicator of our society's affluence and achievement. "Fully Grown" presents a compelling case that challenges readers to rethink the foundations of economic success. Vollrath skillfully argues that our current preoccupation with GDP growth overlooks the substantial gains in comfort, security, and luxury that have been achieved, suggesting that these achievements may lead to forms of production and consumption that contribute to our well-being without necessarily spurring growth. This thought-provoking analysis not only resets the terms of economic debate but also prompts a profound reflection on the ultimate goals of economic activity and how they can be best measured and understood.