The Benedictine monk who waged a one-man war against Spanish superstition and ignorance

Ideas & Philosophy · Published 3 October 2026 Swipe more like this →

In short: In the 18th century, Benito Jerónimo Feijóo y Montenegro emerged as the unlikely leader of the Spanish Enlightenment. A Benedictine monk and university professor, he dedicated his life to debunking myths and popularizing empirical science, forever changing the intellectual landscape of Spain through his vast, encyclopedic collections of essays.

Born in 1676, Feijóo joined the Benedictine order at age 12, eventually becoming a professor of theology and philosophy at the University of Oviedo. While his formal career was rooted in traditional religious education, his intellectual ambition reached far beyond the monastery walls. He was deeply troubled by the pervasive ignorance and superstition of his era, viewing it as a barrier to national progress. His response was not to retreat, but to write, producing an immense body of work that brought the latest scientific and philosophical developments to a broader audience.

His two primary contributions, the Teatro crítico universal (1726–1739) and the Cartas eruditas y curiosas (1742–1760), functioned as a massive, multi-volume clearinghouse for knowledge. These essays spanned an extraordinary range of topics, including natural history, medicine, philology, and law. By addressing contemporary journalistic interests alongside deep philosophical inquiries, Feijóo sought to cultivate a public capable of critical thought. Though he faced opposition from contemporaries like Salvador José Mañer, his influence proved resilient, and he is now recognized as the initiator of educational reform in Spain.

History has treated his legacy with nuance. A century after his death, critics like Alberto Lista offered a backhanded compliment, suggesting his works should be burned at the base of his own monument—a testament to the polarizing nature of his efforts. While he is not remembered for a singular scientific discovery or transcendent literary genius, his clear, distinct style made complex ideas accessible. As scientific learning advanced, his specific claims were eventually relegated to historical interest, yet his role in awakening an interest in empirical methods remains a cornerstone of his enduring reputation as a pioneer of the Spanish Enlightenment.

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