Deeply grateful to @ibero_economia for the opportunity to speak and interact with a community of extraordinary of social scientists and remarkable students. Special thanks to Isidro Soloaga @IsidroSolo90253 for the invitation and the extraordinary hospitality-he and his colleagues have built a real community. This wonderful experience was matched by deep sadness and shame I felt hearing about the fears of students about applying to US universities and of scholars about working at them, given the precarity of visa status and the growing demonization of Latin Americans. Beyond the moral condemnation this atmosphere warrants, it is also scientific suicide for American social science.