With a keen focus on the contemporary case of Javier Milei, this book explores the cyclical nature of Argentina's economic crises and the corresponding rise of populist leaders. It argues that populism represents a revolutionary stance that should be reclaimed by progressive movements, examining the relationship between financial turbulence and populist allure through the lens of heterodox economics, particularly Modern Monetary Theory (MMT). It also provides a fresh re-reading of Argentine history leading up to Milei’s presidency, using post-Keynesian framework to analyse the complex interplay between fiscal policies and political ideologies.