From its origins in the 1840s, Dallas developed quickly into a prosperous market town. After acquiring two railroads in the 1870s, the city became the commercial and financial center of North Central Texas. Early urban development featured competition and cooperation between the city’s business leadership, women’s groups, and coalitions formed by Populists, socialists, and organized labor. Notably, the city’s African Americans were marginalized economically and excluded from civic affairs. By the end of the 1930s, city building became more exclusive even for the white population. A new generation of business leaders threatened by disputes over Progressive Era social reforms and city planning, the revival of the Ku Klux Klan, and attempts to organize industrial workers used its control of local media, at-large elections, and repression to dominate civic affairs until the 1970s.