How Deadly Was the Spanish Inquisition?

The Spanish Inquisition is a byword for religious cruelty, a machine of torture and burnings that terrorised a nation for centuries. Much of that picture was built by people with reasons to exaggerate it. But the truth is not a vindication. It is a more unsettling story of ordinary administration put to the service of persecution.

The origins of the legend

The Inquisition was founded in 1478 by Ferdinand and Isabella to investigate converts from Judaism suspected of secretly practising their old faith. In the sixteenth and seventeenth centuries, Protestant writers in the Netherlands and England circulated lurid accounts of Spanish cruelty, partly to rally support against Spain. Spanish historians later called this exaggeration the “Black Legend.” Enlightenment authors added their own hostility to the Church.

What the records show

Historians have studied surviving files in detail. One large survey of about 44,000 cases between 1540 and 1700 found that roughly two percent ended in execution, with many more cases suspended or ending in fines and penances. Overall estimates for the whole period run in the low thousands of executions, far below the tens or hundreds of thousands once claimed. The early decades were far more violent than later years, and the principal victims were conversos.

Why the number is not the point

None of this makes the institution humane. It used secret denunciations, confiscated property, allowed torture in some circumstances, and encouraged a culture of suspicion. The expulsion of Spain’s Jews in 1492 was a separate royal decree, but it came from the same climate. A lower death toll than legend suggests does not change the injustice of the system or the harm it did to those it reached.

Editorial assessment

Correcting exaggeration is part of a historian’s duty, but it carries a risk: that a smaller number begins to sound like a lesser crime. The sensible conclusion is that the Inquisition was neither the unique monster of legend nor a harmless relic. It was a typical early modern state institution, efficient, bureaucratic and intolerant, which is arguably more instructive than a monster.