Does landholding inequality undermine democratization? Recent contributions have challenged the argument that landholding elites oppose suffrage extension if geographically fixed assets are unequally distributed. We advance research on this long-standing question by exploiting exogenous variance to reinvestigate the relationship. Using multiple instruments, we find that landholding inequality decreases support for suffrage extension. By focusing on traditional patterns of social control, we explore an empirically neglected mechanism linking landholding inequality and democratization. Taking advantage of four direct democratic votes between 1866 and 1877 in Switzerland, we demonstrate that landholding inequality also influences the political preferences of ordinary citizens who do not control these resources. This paper shows that high levels of landholding inequality provide local elites with the incentive and the means to align the local population's voting behaviour with their political goals. Supplementary analyses using qualitative and quantitative data further substantiate this social control mechanism.