Upon this man’s re-election, Karl Marx called him “the single-minded son of the working class.”

The Final Jeopardy clue for September 16, 2025, drew on an unusual but historically grounded moment in 19th-century political thought. Contestants were asked to identify the American president who was praised by Karl Marx as “the single-minded son of the working class” following his re-election.

Who is Abraham Lincoln?

While Lincoln is often remembered through the lens of American political history—his leadership during the Civil War, his Emancipation Proclamation, and his tragic assassination—this clue highlighted an international perspective. Karl Marx, the German philosopher and socialist revolutionary, recognized Lincoln’s re-election in 1864 as a victory for democratic and anti-slavery ideals. In a letter on behalf of the International Workingmen’s Association, Marx commended Lincoln for his role in preserving the Union and combating slavery, framing him as a figure aligned with working-class values.

Lincoln’s Global Reputation and Marx’s Perspective

Karl Marx’s praise for Abraham Lincoln was not casual flattery. It came from a deep ideological conviction that the American Civil War was more than a national conflict—it was part of a global struggle against oppression. In Marx’s eyes, Lincoln’s presidency symbolized the potential of democratic institutions to resist aristocracy and slavery, both of which Marx viewed as barriers to worker liberation and human progress.

The letter Marx co-authored was sent to the White House in late 1864 and was formally addressed to President Lincoln. In it, Marx expressed admiration for Lincoln’s “untiring energy” in the fight against slavery, emphasizing that the working classes of Europe saw his victory as a triumph for social justice. Though Lincoln never directly responded to Marx, a formal acknowledgment from U.S. Ambassador Charles Francis Adams was sent in return.

Why Marx Considered Lincoln a Working-Class Hero

Despite their very different backgrounds—Lincoln a frontier lawyer turned politician, Marx a German philosopher living in exile in London—the two figures shared a belief in the power of societal reform. Lincoln’s humble beginnings and political stance against the expansion of slavery positioned him as a relatable and symbolic figure to many labor movements abroad.

Marx recognized that Lincoln’s actions had far-reaching implications. Ending slavery in the United States, Marx believed, was a blow to the global system of labor exploitation. By identifying Lincoln as a “son of the working class,” Marx was emphasizing how Lincoln, though not a socialist, had helped advance principles that aligned with the broader cause of human equality and economic justice.

The 1864 Re-Election and Its Historical Importance

Lincoln’s re-election in 1864 was far from guaranteed. The Civil War was still raging, and public confidence was fragile. However, Union military victories late in the year, including General Sherman’s capture of Atlanta, shifted the tide in Lincoln’s favor. He won a decisive victory over Democratic challenger George B. McClellan, securing a second term and ensuring the continuation of his wartime policies.

The international reaction to Lincoln’s re-election was profound. European observers, particularly those aligned with liberal and working-class causes, viewed the outcome as a powerful affirmation of democratic resolve. Marx’s letter, though written from across the Atlantic, reflected a broader sense of solidarity among those who saw the Civil War as a test of modern democratic values.

A Jeopardy Clue That Bridges Ideologies and Continents

This Final Jeopardy clue offered a unique intersection of American political history and European intellectual history. It reminded viewers that Lincoln’s impact extended beyond U.S. borders, influencing global conversations about freedom, labor, and justice. While Marx and Lincoln operated in different spheres, both were historical forces in shaping modern conceptions of liberty and equality.

By choosing this moment as a trivia prompt, Jeopardy! highlighted a lesser-known but meaningful tribute. It wasn’t just a question about Lincoln—it was an invitation to reflect on how ideals of justice and leadership resonate across time, class, and national boundaries.