Although there were some achievements that improved conditions for African Americans and other non-white minorities, the Progressive Era was the nadir of American race relations. While white Progressives in principle believed in improving conditions for minority groups, there were wide differences in how this was to be achieved. Some, such as Lillian Wald, fought to alleviate the plight of poor African Americans. Many, though, were concerned with enforcing, not eradicating, racial segregation. In particular, the mixing of black and white pleasure-seekers in "black-and-tan" clubs troubled Progressive reformers.[95] The Progressive ideology espoused by many of the era attempted to correct societal problems created by racial integration following the Civil War by segregating the races and allowing each group to achieve its own potential. That is to say that most Progressives saw racial integration as a problem to be solved, rather than a goal to be achieved.[96][97][98] As white progressives sought to help the white working-class, clean-up politics, and improve the cities, the country instated the system of racial segregation known as Jim Crow.