From the preeminent historian of 20th century Spain Paul Preston, this book is a new history of how paranoia, conspiracy and anti-Semitism was used to justify the military coup of 1936 and enabled the construction of a dictatorship built on violence and persecution. It is the previously untold story of how antisemitic beliefs were weaponised to justify and propagate the Franco overthrow of liberal Spain. The book presents vivid portraits of the key ideologues who propagated the myth of the Jewish-Masonic-Bolshevik Conspiracy and of the military figures who implemented the atrocities that it justified. Among the convictions shared by these individuals was their belief in the idea that Freemasonry was responsible for Spain’s loss of empire and in the factual veracity of The Protocols of the Elders of Zion, the notorious fiction about the global domination of the Jews.