John L. Esposito, a pivotal scholar of religion and international affairs at Georgetown University, passed away on July 15, 2026, following complications from heart surgery. He was 86.

Esposito was a prolific author and influential academic whose work fundamentally altered how the West perceived and studied Islam and Muslim societies, particularly during periods of heightened global tension. His career spanned the late 20th and early 21st centuries, a time marked by significant friction in Islam-West relations, notably after the 1979 Iranian revolution and the September 11th attacks.

Born in Brooklyn, New York, in 1940 to a working-class Italian-American family, Esposito's early life was shaped by his devout Catholic upbringing and his father's commitment to social justice. He initially pursued a path toward the Catholic priesthood, joining the Capuchin Franciscan Order, but ultimately left the seminary before ordination to pursue graduate studies.

He earned a doctorate in religious studies from Temple University, where he studied under the late Palestinian-American scholar Ismail al-Faruqi. Esposito's chosen field was not widely recognized when he entered the job market in 1974; positions in Islamic studies were scarce, and many academic programs overlooked the significant role of religion in international affairs.

Esposito himself often humorously attributed his career's demand to two prominent, albeit controversial, Muslim figures: Ayatollah Khomeini and Osama bin Laden. The increased Western interest in Islam and politics following the 1979 Iranian revolution and the 9/11 attacks created a sudden, high demand for his expertise. He responded by publishing numerous influential books that explored the relationship between Islam and politics, the normative ideals of Islam, Islam-West relations, and the diverse political and social structures within Muslim societies.

His scholarship became essential for media outlets seeking to understand these complex issues, and governments began to seek his counsel. However, Esposito's work also highlighted the often-biased context surrounding Western engagement with Islam, which was frequently framed by national security concerns, political revolution, and perceived threats to global order, rather than a free and independent pursuit of understanding.

Throughout his career, Esposito published more than 55 books, many with Oxford University Press, which have been translated into numerous languages. His academic contributions are credited with challenging Orientalist orthodoxies and providing a more nuanced and comprehensive understanding of Islam and its adherents on the global stage.

Esposito's legacy lies in his dedicated efforts to foster this understanding, providing critical insights during moments of significant global polarization and conflict, thereby transforming academic discourse and public perception of Islam in the West.