This article examines the foundation myths of Brazil in the last two centuries, paying particular attention to the relationship between these myths and governmental attitudes toward the hybridity of Northern and Southern ethnic and technoscientific entities. Based upon this examination, the article argues that it is important to consider both the wider temporal frames and the shifts and sedimentations that have formed current foundation myths and shaped their relation to science and technology. Postcolonial science technology studies theories illuminate aspects of this trajectory, but our analysis suggests a more complex scenario that involves internal political dynamics and the work of local intellectuals. We argue that the example of Brazilian social scientists should encourage scholars to go beyond the current focus on breaking the myths of technoscience and undertake mythmaking initiatives with wider societal resonances.