326 MARYLAND LAW REVIEW [VOL. 42 that the poor were carriers of tuberculosis, typhus, and other diseases (all of which poor blacks had in disportionate numbers). The simplest single explanation for segregation is that it represented an effort by the healthy white majority to quarantine the unhealthy black minority, , When the segregation ordinances were conceived, racial Social Darwinism was in vogue. This false teaching made the quarantine seem an effective strategy. Blacks were viewed as a degenerating race with a high mortality rate, low birth rate, and no future. Left to them- selves, the Social Darwinists argued, Negroes would die out and with them the threat of epidemic disease. Advances in public health, how- ever, not racial quarantines, finally reduced the threat of contagion. ' The black population, rather than disappearing, came to outnumber whites in Baltimore City. The social engineers who propounded the segregation ordinances were on the wrong track moving in the wrong direction. A third lesson we have gained, from Baltimore's history of housing segregation is that we must discount the righteous rhetoric of reform. Since the early twentieth century the Progressive Reform Movement has advocated government intervention into the residential housing market. But, if we observe closely the motives of the self-appointed promoters of the public interest, the reformers plainly were not inter- ested in improving the living conditions of those who suffered most from the industrializing, urbanizing society. Instead, the reformers supported housing segregation as a means for preventing contagion and civil disturbance as it affected the white community. Similarly, these reformers earnestly proposed and implemented slum clearance without providing substitute housing opportunities for those whose . homes were destroyed. In their efforts to impose a quarantine on dis- ease and crime, and to protect the value of their property, reformers conveniently overlooked the devastating effect slum clearance and ra- cial segregation had on black housing opportunities. Instead, reform- ers salved their guilt by "blaming the victims" for the slum conditions in which they lived. Finally, this history of residential segregation in Baltimore docu- ments the racist propensity of democratic rule. In an opinion sus- taining the constitutionality of a law that required a majority vote at a local referendum as a prerequisite to the siting of a low-income hous- ing project, U.S. Supreme Court Justice Hugo Black said: "Provisions for referendums demonstrate devotion to democracy, not to bias, dis- crimination, or prejudice."212 Our history suggests that Black's dichot- 212. Jam« v. Valtierra, 402 U.S. 137, 141 (1971).