William Strauss (1947-2007) was an American author, historian, and satirist who co-originated the generational theory that provides the foundation for The Fourth Turning Is Here. Alongside Neil Howe, he coauthored Generations (1991) and The Fourth Turning (1997), which introduced the core concepts of the modern American saeculum: four repeating generational archetypes (Prophet, Nomad, Hero, Artist) and four corresponding historical turnings (High, Awakening, Unraveling, Crisis). Strauss, who passed away on the eve of the 2008 global financial crisis, provided the framework that Howe extends and reapplies to contemporary events.

Strauss’s relevance to the text is central. His earlier periodization of American history and his formulation of generational archetypes supply the essential vocabulary and structure for Howe’s analysis of the current Fourth Turning. The book’s forecasts are a direct continuation of the theoretical model Strauss helped build. His methodology, which blended historical case studies, cohort analysis, and social-cycle theory, established the comparative-historical approach that Howe employs to draw parallels between past crises and the present.

As the co-architect of the generational paradigm, Strauss’s intellectual legacy is the baseline for the book’s forecasts. His work defined the recurring patterns of social mood and behavior that Howe now observes playing out in the 21st century. The Fourth Turning Is Here is both a validation and a reappraisal of the prophecy that Strauss helped formulate, marking a continuity between the original theory and its application to a world that has since experienced the very type of Crisis that he and Howe predicted.

Abraham Lincoln (1809-1865), the 16th president of the United States, serves as a paradigmatic Crisis-era leader whose actions during the Civil-War Fourth Turning exemplify the themes of national redefinition and shared sacrifice. Howe presents Lincoln as a quintessential “Gray Champion,” a leader whose moral and political authority guides a society through its most severe trials. Lincoln’s leadership during the nation’s deadliest conflict illustrates how a Fourth Turning climax can elevate a nation’s purpose and re-found its civic identity.

Howe uses Lincoln’s presidency to demonstrate how a Crisis can forge constitutional and moral commitments that were previously unattainable. By issuing the Emancipation Proclamation, Lincoln transformed the Union’s strategic and moral objectives, connecting the war effort to a higher purpose. This act exemplifies the book’s argument that Fourth Turnings are not just periods of destruction but also opportunities for civic reconstruction.

Within the book’s cyclical framework, Lincoln’s legacy is to define the benchmark for leadership during a national crisis. His rhetoric of reconciliation and renewal, coupled with his willingness to exercise decisive authority, provides a historical template for how a society transitions from a destructive conflict to a unifying High. He represents the ideal of a leader who can channel the turmoil of a Fourth Turning into the foundation of a new and more cohesive civic order.

Franklin D. Roosevelt (1882-1945) is presented as the archetypal leader of the US’s most recently completed Fourth Turning: the Great Depression-WWII era. As the 32nd president, he steered the nation through economic collapse and global conflict, making him a modern exemplar of Crisis leadership. Howe uses Roosevelt’s presidency to illustrate how a society passes from a period of institutional breakdown and social despair to one of reconstruction and renewed civic purpose. His actions provide the most recent historical model for the kind of leadership and societal transformation that Howe forecasts for the current Millennial Crisis.

Roosevelt’s policy innovations and communication style are central to the book’s argument. His launch of the New Deal, particularly the emergency reforms of the “Hundred Days,” exemplifies the large-scale institutional experimentation characteristic of a Fourth Turning. Through his “fireside chats,” he built a direct relationship with the public, fostering the trust needed to mobilize the nation for both economic recovery and total war. This connection between state capacity and public confidence is a key theme in the book, demonstrating how a leader can re-legitimize institutions during a period of extreme stress.

Roosevelt’s legacy within the text is to demonstrate the lasting effects of a successful Crisis resolution. His administration not only navigated the Great Depression and led the Allies to victory but also established the postwar liberal order—the “American High”—that defined the subsequent First Turning. The institutions and global alliances born from that era structured American society for decades, providing a concrete example of how the outcome of a Fourth Turning can shape the next saeculum. For Howe, Roosevelt is the most immediate prototype for the kind of consolidating leadership required to guide a nation from Crisis to a new civic order.

Ibn Khaldun (1332-1406), an Arab historian and social theorist, is cited in The Fourth Turning Is Here as an intellectual forerunner to the book’s cyclical model of history. Author of The Muqaddimah (1377)—a universal history whose scope and ambition provides a model for Howe’s work—he articulated one of the earliest secular theories of state formation and decline based on observable social dynamics rather than divine intervention. His inclusion grounds Howe’s generational theory in a long and diverse historiographical tradition, suggesting that the concept of recurring social cycles is not a modern invention but a long-standing observation.

Khaldun’s core concept of ’asabiyya, or group solidarity, resonates with the book’s emphasis on social cohesion as a driving force in history. He argued that dynasties rise and fall in a predictable rhythm as ’asabiyya strengthens and weakens over several generations. This generational turnover mechanism mirrors the engine of Howe’s saeculum. By referencing Khaldun, Howe establishes that the idea of generational succession causing predictable shifts in social mood and political fortunes has deep historical roots, lending his own theory greater weight.

Arnold J. Toynbee (1889-1975), a renowned British historian, provides key intellectual support for the cyclical framework in The Fourth Turning Is Here. In his multi-volume work, A Study of History, Toynbee identifies a recurring pattern of “general wars” that punctuate modern history at approximately 100-year intervals. Howe cites this finding to corroborate the timing of Fourth Turnings, showing that an independent historical analysis arrived at a similar century-scale rhythm of crisis and reconstruction.

Toynbee’s theory of an “alternating rhythm” of major wars followed by periods of settlement reinforces the book’s placement of past Crises, such as the Napoleonic Wars and the two World Wars. Like Howe, Toynbee attributed this periodicity to a “Generation Cycle,” arguing that the collective memory of a devastating war fades over time, allowing a new generation unfamiliar with its horrors to lead society back into conflict. This provides external validation for the core mechanism of Howe’s model: that generational change drives recurring shifts in the social attitude toward war and peace.

Quincy Wright (1890-1970) was an American political scientist whose influential work, The Study of War (1942), offers empirical support for the generational theory at the heart of The Fourth Turning Is Here. Wright conducted a comprehensive analysis of the causes and periodicity of war, identifying long-cycle oscillations in conflict that he linked directly to generational replacement. His research provides social-scientific scaffolding for Howe’s claim that a society’s propensity for conflict recurs as the memory of the last major war fades.

Howe integrates Wright’s findings to bolster his theory of the saeculum. Wright’s argument that rising generations lose their aversion to conflict aligns perfectly with the Strauss-Howe model of generational turnover driving historical turnings. By referencing Wright, Howe places his own theory within a cumulative lineage of academic research on long cycles, demonstrating that the connection between generational change and large-scale conflict is a well-established concept in political science.

Arthur M. Schlesinger Jr. (1917-2007), a Pulitzer Prize-winning American historian and public intellectual, is featured in The Fourth Turning Is Here for his influential theory of recurring political cycles in American history. Schlesinger proposed that the US alternates between periods of “public purpose,” characterized by a focus on collective action and reform, and periods of “private interest,” marked by individualism and conservatism. This cyclical view of the American political mood complements the book’s broader generational model.

Howe integrates Schlesinger’s framework by aligning the eras of “public energy” with the book’s Awakening and Crisis turnings. By doing so, he connects the abstract generational archetypes to a well-known narrative of American political history. Schlesinger’s work provides a US-specific vocabulary and set of historical case studies that help root the saecular theory in familiar historiography, making the pattern of alternating social moods more recognizable to readers familiar with American political thought.