Purpose: This paper conceptualizes a just leadership learning ecology through an analysis of one nontraditional site of leadership preparation: the Highlander Research and Education Center (originally founded as the Highlander Folk School). Methodology: Drawing on cultural historical activity theory (CHAT) and institutional theory (IT), we examine the core design and pedagogy of Highlander, which co-founder, Myles Horton, referred to as the "Highlander idea." Findings: We illustrate how a residential learning and living environment, norms of epistemic humility and democratic decision making, and horizontal teaching and learning roles fostered social justice leadership. This just leadership learning ecology reflected institutions present at the time of Highlander's founding, including cultural scripts rooted in prophetic Christianity, class consciousness, and unfolding social movements in Appalachia and the South. Implications: Our analysis of Highlander extends recent efforts to re-envision the how and who of leadership preparation and addresses the observed lack of coherence within this subfield.