The formal office of the devil’s advocate, known in Latin as Promotor Fidei (Promoter of the Faith), was established in 1587 by Pope Sixtus V. Contrary to popular belief, the role was not created to introduce doubt for its own sake, but to ensure intellectual honesty in the canonization of saints.
The underlying principle was that if a candidate could withstand the most rigorous possible attack—if the devil’s own best arguments could not discredit them—then their sainthood could be declared with moral certainty. Pope John Paul II reduced the prominence of this office in 1983, streamlining the canonization process, but the role technically still exists, albeit in a diminished form. el abogado del diablo
The brilliance of the devil’s advocate lies in its acknowledgment of cognitive bias. Human beings, especially groups in institutional settings, are prone to confirmation bias—the tendency to seek out and favor information that confirms pre-existing beliefs. By mandating a formal dissenter, the Church institutionalized : the thesis (the candidate is a saint) must survive the antithesis (the candidate is not a saint) to reach a stronger synthesis (canonization). The formal office of the devil’s advocate, known
"El abogado del diablo" originated as a sophisticated instrument of institutional humility—a way for the Catholic Church to admit that even its most revered judgments could benefit from structured doubt. Its secular legacy, when used responsibly, remains valuable: it reminds us that strong beliefs require strong tests. But the title carries a warning. The original devil’s advocate served the truth, not the devil. Without procedural guardrails and genuine openness to being proven wrong, the modern devil’s advocate risks becoming merely an advocate for their own cleverness. Pope John Paul II reduced the prominence of
El Abogado del Diablo: From Canonization to Corporate Conscience