This book chronicles the rise and especially the demise of diverse revolutionary heterodox traditions in Cambridge theoretical and applied economics, investigating both the impact of internal pressures within the faculty as also the power of external ideological and political forces unleashed by the global dominance of neoliberalism. Using fresh archival materials, personal interviews and recollections, this meticulously researched narrative constructs the untold story of the eclipse of these heterodox and post-Keynesian intellectual traditions rooted and nurtured in Cambridge since the 1920s, and the rise to power of orthodox, mainstream economics. Also expunged in this neoclassical counter-revolution were the structural and radical policy-oriented macro-economic modelling teams of the iconic Department of Applied Economics,  along with the atrophy of sociology, development and economic history from teaching and research in the self-purifying faculty. This book will be of particular interest to researchers in the history of economic thought, sociology of knowledge, political economy, especially those engaged in heterodox and post-Keynesian economics, and to everyone wishing to make economics fit for purpose again for negotiating the multiple economic, social and environmental crises rampant at national and global levels.