Across the West, economic dislocation and demographic change have triggered a demand for strong leaders. This surge of populism is more than an emotional backlash; it encourages a political structure that threatens liberal democracy. While populism accepts principles of popular sovereignty and majoritarianism, it is skeptical about constitutionalism and liberal protections for individuals. Moreover, populists’ definition of “the people” as homogeneous cannot serve as the basis for a modern democracy, which stands or falls with the protection of pluralism. Although this resurgent tribalism may draw strength from the incompleteness of life in liberal society, the liberal-democratic system uniquely harbors the power of self-correction, the essential basis for needed reforms.