Planning struggles with the tension between professional expertise and public voice. The approaching 75th anniversary of Philip Selznick's classic, TVA and the Grass Roots, is an apt time to revisit that tension. In Selznick's analysis, Tennessee Valley Authority (TVA) was a modernist institution aligning with local agricultural elites at the expense of vulnerable Black and poor farmers. He coined the term ‘informal co-optation’ to characterize TVA's affiliation with the powerful. We bring renewed attention to informal co-optation and the institutional aspects of engagement by examining how Selznick's analysis was received contemporaneously, and then considering recent scholarship and the current implications of Selznick's work.