Sewer socialism: what Milwaukee's pragmatic socialist experiment actually was

For roughly half a century, spanning three non-consecutive mayoral administrations between 1910 and 1960, the city of Milwaukee was governed by members of the Socialist Party of America — a fact that surprises many Americans today, given the party's marginal status in national politics for most of its history. The label attached to their brand of governance, 'sewer socialism,' began as a dismissive jab from political rivals and eventually became the accepted shorthand for what the Milwaukee socialists actually did in office.

The term mocked what critics saw as an unambitious, technocratic version of socialism, one preoccupied with sewage systems, water treatment, paved streets and public parks rather than the revolutionary transformation of the economic order that socialist rhetoric elsewhere promised. Milwaukee's socialist mayors, the joke implied, had traded world revolution for storm drains.

Emil Seidel, elected in 1910 as the first socialist mayor of a major American city, set the template that his successors would follow: a focus on municipal efficiency, public health infrastructure and rooting out the patronage-driven corruption that had characterized Milwaukee's city government under prior administrations. His victory came amid a wave of Progressive Era municipal reform sentiment that made socialist candidates, running on clean government, unexpectedly competitive.

Daniel Hoan, who served as mayor from 1916 to 1940, became the movement's most consequential figure, presiding over a vast expansion of the city's public infrastructure — water and sewer systems, a public water utility, parks, and one of the country's first public housing developments — while balancing budgets and largely avoiding the graft scandals that plagued comparable big-city administrations of the era.

The socialists' pragmatic approach reflected the specific character of Milwaukee's labor and immigrant politics rather than a national ideological template. The city had a large German immigrant population with strong trade union traditions and, under longtime party leader Victor Berger, a socialist movement that explicitly rejected the more revolutionary currents within American socialism in favor of building electoral coalitions around concrete municipal improvements voters could see and use.

This pragmatism distinguished Milwaukee's socialists from more doctrinaire currents within the broader American socialist and labor left, some of whom viewed the Milwaukee approach as a capitulation — proof that socialism, once it won power through ordinary elections, would inevitably become indistinguishable from good-government liberalism rather than pursue structural economic transformation.

Frank Zeidler, the last of Milwaukee's socialist mayors, served from 1948 to 1960 during the peak of American Cold War anti-communism, a period in which the Socialist Party label had become a significant political liability nationally even as Zeidler continued to win Milwaukee elections on a platform of public housing, integrated schools and municipal services.

The Socialist Party nationally declined sharply through the mid-20th century, squeezed between the New Deal's absorption of many of its policy positions into mainstream Democratic politics and the intense political suspicion cast on anything associated with socialism during the Cold War. Milwaukee's municipal socialism outlasted the national party by decades precisely because it had built its appeal around visibly effective local governance rather than an explicit socialist identity.

Historians studying the period generally credit sewer socialism with leaving a durable institutional legacy in Milwaukee — a public water utility, a reputation for administrative competence, and a template later invoked, sometimes loosely, in debates about municipal ownership of utilities and public services in other American cities.

The phrase has resurfaced periodically in contemporary political debate, invoked by critics and admirers alike as a reference point for what a modest, service-delivery-focused version of left municipal politics can look like in practice — a reminder that the most durable socialist experiment in American history was, by design, one of the least ideologically dramatic.