Freemasonry and Judaism: Secret Powers Behind Revolution (1929) by Vicomte Léon de Poncins is a foundational text in conspiracy literature that argues a clandestine, coordinated effort between Freemasonry and specific Jewish interests is responsible for major modern revolutions. De Poncins asserts that these groups work to systematically dismantle Christian, monarchical civilization and replace it with a centralized, rationalist, and secular "New World Order". Written in the interwar period, the book is considered a "must-read" to understand the 20th-century right-wing, anti-modernist, and anti-revolutionary perspectives. It is followed by other works by the same author, including Judaism and the Vatican and Freemasonry and the Vatican. The work was influential in circulating the "Judeo-Masonic conspiracy theory" and is often cited alongside documents such as The Protocols of the Elders of Zion.