"The Revolt of the Masses" is a book written by Spanish philosopher José Ortega y Gasset in 1930. In this work, Ortega explores the rise of the masses in society and how their increasing influence can lead to a decline in cultural and intellectual standards. He argues that the masses, lacking a strong sense of individual responsibility, can disrupt established norms and values. Ortega contrasts the "mass man" with the "elite," suggesting that the latter must guide society to maintain progress and civilization. He warns that unchecked mass movements can threaten democracy and lead to authoritarianism, as the masses may prioritize immediate desires over long-term societal well-being.