Why The West Rules—For Now: The Patterns of History, and What They Reveal About the Future: Summary & Key Insights

To understand why the West rules—at least for now—we must begin in the deep past, when no West or East existed in any recognizable form. Around 50,000 BCE, humans everywhere lived in what I call the Biological Old Regime: an era defined by the limitations of environment and biology. People depended entirely on the energy nature provided in real time—the sunlight captured by plants, the animals they hunted, the water they drank. Geography, climate, and ecology dictated everything.

Our ancestors survived not by conquering their surroundings but by adapting to them. Different environments produced different kinds of societies: small, mobile bands in arid regions, more sedentary groups in fertile areas where wild grains or game were abundant. These societies were socially simple because they were constrained by the amount of energy they could extract from nature’s bounty. There was little room for hierarchy or complex institutions when everyone’s daily task was survival.

This chapter examines how ingenuity nonetheless began to erode those limits. Ice ages and climatic fluctuations forced migrations; human communities innovated tools, language, symbolic systems. Yet these changes were local and incremental. In biological terms, humans everywhere faced the same predicament: nature imposed a ceiling on social development. Only when people discovered ways to control energy sources beyond immediate ecosystems could this ceiling lift. Thus, we prepare for the first major turning point in world history—the agricultural revolution—that would crack open entirely new pathways of development.

About 14,000 years ago, the global climate stabilized after the end of the last Ice Age. This stability presented opportunities: certain regions, notably the Near East and East Asia, offered rich environments where people could experiment with agriculture. Geography again played the starring role. In the Fertile Crescent, wildly growing cereals were easily domesticated, while in the valleys of the Yellow and Yangtze Rivers, rice cultivation began to redefine human relations with nature.

As humans learned to store energy in grain and wield it at will, societies transformed. Populations exploded, towns formed, and new hierarchies crystallized. But even this revolution was uneven. Farming spread only where geography allowed; thus, centers of innovation emerged independently in both East and West. I call this the first great divergence. It produced multiple world regions whose developmental trajectories began to separate, shaped by different landscapes, resource distributions, and climatic pressures.

Yet the underlying principle remained the same: geography set the stage, while humans’ adaptive ingenuity dictated the play. Agricultural success led to surplus wealth but also new vulnerabilities, from disease to political tyranny. Still, agriculture represented humankind’s first victory over the constraints of the Biological Old Regime. It established the basic equation that would govern all future civilizations: power grows where societies can harness more energy than their competitors, and where organizational complexity allows that energy to be sustained and directed.