The Long History of Urban Renewal: Why Clearing Slums Makes Things Worse

In the spring of 1853, Baron Georges-Eugène Haussmann sat across from Napoleon III and received a commission that would reshape the most admired city in the world. Over the following seventeen years, Haussmann demolished approximately sixty percent of medieval Paris, displacing an estimated 350,000 people from the central arrondissements in order to build the wide boulevards, uniform limestone facades, and sewer systems that tourists now photograph as evidence of timeless French elegance. The people he displaced went — largely — to the peripheral slums of Belleville and the outer banlieues, where their descendants have lived, in concentrated poverty, ever since. The beautiful Paris that exists today was built, in the most direct sense, on top of the poor Paris that was destroyed. The urban poor did not disappear. They were relocated.

This is the central fact about slum clearance that every generation of urban reformers rediscovers and immediately forgets: you cannot demolish poverty by demolishing the housing that poor people live in. You can demolish the housing. The poverty goes somewhere else. And in the process of going somewhere else, it usually gets worse — more concentrated, more isolated, more cut off from the economic opportunities that the centrally located slum, for all its miseries, provided. The history of urban renewal is the history of this lesson being taught, ignored, taught again, and ignored again, at enormous cost to the people at the bottom of the housing market.

What Slums Actually Provide

The word “slum” is a moral judgment disguised as a geographic description. It tells you nothing useful about what the buildings in question actually do for the people who live in them. To understand why clearing slums consistently makes things worse, you need to start by understanding what slums actually provide — which is, in most cases, something extremely valuable.

Slums provide cheap, accessible housing in proximity to employment. This is not a small thing. It is, in fact, the primary variable in determining whether poor families can participate in the urban economy at all. The reason poor neighborhoods cluster in city centers and near industrial areas is not that poor people prefer proximity to factories and commercial districts for aesthetic reasons. It is that long commutes are expensive in both money and time, and poor households can afford neither. A factory worker in nineteenth-century Birmingham or twentieth-century Detroit living within walking distance of his plant could spend virtually nothing on transportation. The same worker housed in a clean, new public housing estate several miles from the city center spent money he often did not have on bus or tram fares, or he simply could not take the job.

The housing in slums is also — and this is the fact most urban reformers found most difficult to accept — often economically productive in ways that inspectors and planners did not measure. The classic Victorian slum was a mixed-use environment of extraordinary density. Ground-floor rooms served as workshops, market stalls, repair shops, and small-scale manufacturing. Courtyard spaces functioned as animal yards, vegetable patches, and communal processing areas for piece-work manufacturing. The “slum” was simultaneously a residential neighborhood and an informal industrial district, and the two functions supported each other in ways that formal zoning categories could not accommodate.

Jacob Riis photographed the Lower East Side of Manhattan in the 1880s as an indictment of tenement conditions. His photographs were accurate about the overcrowding, the sanitation failures, and the physical degradation. They were systematically misleading about the economic vitality. The same blocks that Riis showed as scenes of misery were also the location of the garment district, the food markets, and the small manufacturing firms that employed the very immigrants he was documenting. The slum was terrible housing and extremely functional economic geography simultaneously.

Haussmann’s Arithmetic and Its Lessons

The Haussmannization of Paris is the founding case study of urban renewal, and it repays careful study because it demonstrates so clearly both why the policy appealed to its architects and why it reliably failed the people it supposedly helped.

Napoleon III’s stated goals for the Paris renovation were partly sanitary (the cholera epidemics of 1832 and 1849 had killed tens of thousands), partly political (wide boulevards were harder to barricade in the manner of the 1848 revolution), and partly aesthetic (Paris should look like an imperial capital). All three goals were substantially achieved. The new Paris had functional sewers, was militarily manageable, and was strikingly beautiful. The cholera problem was largely solved, though it is worth noting that most of the sanitary improvement came from the sewers and the water mains, not from the demolition of housing per se.

What was not achieved was any improvement in the housing conditions of the working poor. The workers who had lived in the demolished central districts were relocated, with various degrees of compulsion and compensation, to the peripheral zones of the city. These zones had no sewers (the new sewer system primarily served the new boulevards), minimal public transport, and limited access to the employment concentrated in the city center. The rents in the new workers’ housing were often higher in absolute terms than the rents in the demolished slums, because the displaced population was competing for a suddenly constricted supply of cheap housing in the periphery.

The displacement did not merely relocate poverty. It deepened it. The small-scale economic activities — the workshops, the market stalls, the piece-work manufacturing — that had been embedded in the demolished slums could not survive transplantation to the periphery, because they depended on proximity to the customers and suppliers who remained in the center. What had been a mixed-use working-class economy in the central city became a purely residential dormitory in the periphery. The workers still needed to get to the center for employment; they now had to pay for the privilege of doing so.

The political consequences were exactly what the more perceptive critics of Haussmannization predicted at the time. The Commune of 1871 was organized and prosecuted primarily by the workers of the peripheral arrondissements — precisely the population that Haussmann had concentrated there. The same policy that Napoleon III had partly designed to reduce the threat of urban insurrection had, by concentrating the displaced working poor in isolated peripheral zones, created exactly the conditions of concentrated grievance and community solidarity that made insurrection more, not less, likely.

Robert Moses and the American Version

The American urban renewal movement of the 1950s and 1960s reproduced Haussmann’s errors with remarkable fidelity, in a context that should have provided ample opportunity to learn from the European precedent. Robert Moses, the master builder of New York, is the central figure here, though the pattern he embodied was national in scope.

Moses displaced approximately half a million people from New York City neighborhoods between 1945 and 1968 through highway construction, housing project development, and urban renewal projects. The Cross Bronx Expressway, completed in 1963, required the demolition of approximately 1,500 buildings and the displacement of roughly 60,000 residents in the middle-class and working-class neighborhoods of the East Bronx. The communities destroyed to make way for the highway were not slums in the conventional sense — they were stable, densely populated, economically active neighborhoods with functioning local economies, high social cohesion, and relatively low crime rates.

What replaced them — the isolated public housing towers that rose on the cleared land, combined with the population pressure on the remaining neighborhoods from displaced residents — became precisely the dysfunctional, high-crime, high-poverty zones that urban renewal had supposedly been designed to prevent. The South Bronx of the 1970s, which became a global symbol of urban collapse, was not the result of some mysterious organic deterioration. It was the direct and predictable consequence of deliberate policy choices that destroyed the social and economic infrastructure of stable working-class neighborhoods and replaced them with buildings explicitly designed to separate their residents from the surrounding urban economy.

Jane Jacobs documented this process with extraordinary precision in The Death and Life of Great American Cities, published in 1961 — in real time, while Moses was still at the height of his power. Jacobs understood what the planners did not, or would not: that urban vitality depended on the kind of dense, mixed-use, organically evolved environments that urban renewal specialists categorized as slums. The “blight” that justified clearance was, in many cases, exactly the quality of fine-grained urban fabric that produced economic and social resilience. Clearing it produced the opposite of its stated intent.

The Mechanism of Failure

The reason slum clearance consistently fails is not mysterious. It follows directly from the economics of housing markets and the geography of urban opportunity, and it operates through a mechanism that is entirely predictable if you choose to look at it honestly.

Poor households choose cheap, centrally located housing because the alternative — cheap, peripheral housing — imposes transportation costs they cannot afford, cuts them off from informal labor markets and economic networks, and severs the social ties that represent their primary form of economic insurance. When slum clearance forces them out of central locations, they do not improve their economic position. They lose their locational advantage while retaining their poverty. The new housing — whether it is public housing estates, private rentals in peripheral areas, or informal settlements on city edges — is physically cleaner and often more spacious, but it is economically worse because it is in the wrong place.

The social destruction is equally systematic. Urban neighborhoods that have existed for decades accumulate social capital — networks of mutual knowledge, reciprocal obligation, shared childcare, informal job referral, collective self-policing — that do not appear in any planning document and cannot be relocated along with the people who embody them. This social capital is the primary insurance mechanism for households that have no formal insurance, no savings, and no access to credit. Demolishing the neighborhood destroys the social capital at the same moment that it destroys the housing. The new location has neither the locational advantages of the old neighborhood nor the social capital; it must rebuild both from scratch, over decades, while the dislocated residents absorb the full cost of the transition.

The Policy That Actually Works

The alternative to clearance — incremental rehabilitation, infrastructure investment within existing neighborhoods, tenant property rights, and density increases without displacement — has been demonstrated to work in numerous historical and contemporary contexts. The transformation of Spitalfields in London, which shifted from a Victorian slum to a functioning mixed-use neighborhood over the course of the twentieth century without mass displacement, shows that physical improvement and poverty reduction can coexist with community continuity. The favela upgrading programs in Brazil, which have produced measurable improvements in health, education, and economic outcomes in neighborhoods that planners would previously have demolished, demonstrate the principle at scale.

The reason clearance persists as a policy despite its record of failure is not ignorance. The planners who designed the Cross Bronx Expressway and the Parisian grands travaux were not stupid men. They were intelligent men acting on incentives that pointed them toward demolition. Clearance is visible; it produces photographs, ribbon cuttings, and legible evidence of action. Rehabilitation is slow, fragmented, and politically diffuse. Clearance benefits real estate developers, construction firms, and the political class that receives campaign contributions from both. Rehabilitation benefits existing residents, who are poor, politically marginal, and have no construction firms to contribute to campaigns.

Every city that has engaged in large-scale urban renewal has engaged in a massive upward transfer of wealth from poor and working-class communities to real estate capital and the political class that facilitated the transfer. The public health justifications were often partly real. The housing improvement goals were almost always genuinely stated. But the consistent outcome — the redevelopment of centrally located land for uses that serve wealthier populations, financed by the displacement of the poor — is too consistent across too many cities and too many decades to be accidental. It is the point, whether the planners acknowledge it or not.