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Walrasianism, Keynesianism, Marxianism, Austrianism, MMT, and Pluralism are materially/formally inconsistent and therefore scientifically worthless. For details see Chapter 13 The indelible scientific disgrace of economics in the canonical textbook Sovereign Economics. *
Because economics is a failed science, economic policy guidance has never had sound foundations. This applies to left/center/right economic policy. More generally, this applies to capitalism and communism and everything in-between. To overcome the pluralism of provably false approaches a Paradigm Shift is imperative. This means practically ‘Scrap the lot and start again’. (J. Robinson) Sovereign Economics is the first comprehensive introduction to the new Paradigm. The new textbook provides the scientifically valid foundations of economic policy. So, Sovereign Economics is for the student of economics who is fed up with 200+ years of proto-scientific garbage and who intends to effectively support the Legitimate Sovereign in realizing the Good Society.