Wallerstein in Plain English is a guide for readers who suspect that global inequality is not a bug, that crises are not accidents, and that capitalism might be a historical system rather than the natural order of things. Beginning with Wallerstein’s intellectual formation and moving through his major concepts and works, the book reconstructs his argument that capitalism operates as a global system with a built-in hierarchy, maintained through unequal exchange, political fragmentation, and recurring crisis. It explains why nation-states are the wrong starting point, why inequality is functional rather than accidental, and why repeated “failures” are often signs that the system is working exactly as designed. The book also takes Wallerstein seriously enough to argue with him. It compares his approach with Marx, Braudel, Polanyi, Arrighi, Harvey, and Foucault, showing where world-systems analysis clarifies what other frameworks obscure—and where it falls short. Finance capitalism, digital platforms, China’s rise, and climate collapse are treated not as afterthoughts, but as stress tests for the theory itself. There are no blueprints here, for the same reason Wallerstein refused to provide them. This is not a book about how to fix the system. It is a book about how to recognize when a system’s solutions stop working, why uncertainty expands instead of resolves, and why periods of crisis make his ideas suddenly relevant again. Written with dry humor, structural pessimism, and minimal patience for comforting myths, Wallerstein in Plain English is for readers who want to understand the modern world without being reassured by it.