Long before "socialism" became a cable-news punchline, radical and socialist movements were already shaping American law, labor and public life. This is the record — the accomplishments and the failures both.
The People's Party emerged from farmer and labor cooperatives in the South and Midwest, organizing against railroad monopolies, concentrated banking power and the gold standard. Many Populist demands — a graduated income tax, direct election of senators, an eight-hour workday — were considered radical at the time and became mainstream law within a few decades.
Eugene V. Debs, a former railway union leader, ran for president five times on the Socialist Party ticket, including in 1920 from a federal prison cell, where he'd been sentenced for opposing U.S. entry into World War I. He won nearly a million votes that year. Socialist Party candidates held mayoral offices in dozens of American cities in this period, including Milwaukee, which elected socialist mayors for decades.
The Congress of Industrial Organizations (CIO) organized mass-production workers — auto, steel, rubber — largely left out by earlier craft unions. The 1936–37 sit-down strike at GM's Flint, Michigan plant, where workers occupied the factory rather than walking a picket line, forced recognition of the United Auto Workers and became a template for industrial organizing nationwide.
Social Security, public power projects like the Tennessee Valley Authority, and the right to unionize under the Wagner Act were all considered dangerously radical by significant parts of the business establishment at the time — and all drew directly on decades of prior socialist and labor organizing for their political viability. The New Deal wasn't socialism, but it was shaped by the pressure socialist and labor movements had spent decades building.
Roughly 2,800 Americans volunteered to fight fascism in the Spanish Civil War as part of the Abraham Lincoln Brigade, years before the U.S. government entered World War II. Many brigade volunteers were affiliated with American socialist and communist organizations of the era — a history complicated by the brigades' Comintern backing, but genuine in its anti-fascist commitment.
Rural electric cooperatives, created under the Rural Electrification Administration, brought power to millions of Americans that private utilities had judged unprofitable to serve — and many still operate as member-owned cooperatives today. Credit unions expanded on similar cooperative-ownership principles, offering an alternative to commercial banking that persists as a mainstream, uncontroversial part of American financial life.
A. Philip Randolph, a democratic socialist and longtime labor organizer, planned the 1963 March on Washington for Jobs and Freedom together with Bayard Rustin, also a democratic socialist. The march's full name is routinely shortened in popular memory — but the "Jobs" in the title reflected an explicitly economic critique of American capitalism, not just a call for legal equality.
American socialist and labor movements were also repeatedly suppressed, sometimes violently, and repeatedly divided against themselves. The First and Second Red Scares — the post-WWI period and the McCarthy era respectively — saw socialist and union organizers jailed, blacklisted and deported, often with minimal due process, setting back organizing for a generation each time.
The movements also fractured internally, often bitterly: over how closely to align with the Soviet Union, over race — some labor unions excluded Black workers well into the 20th century despite the broader movement's egalitarian rhetoric — and over strategy, with splits between electoral and revolutionary factions that consumed energy that might have gone toward organizing. None of that erases what the movements accomplished. It does mean any honest history has to include it.