How did Voltaire defend Jean Calas and his family?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Life-sized plaster sculpture Seated Voltaire by Jean-Antoine Houdon shows Voltaire draped in a robe, seated with a thoughtful expression and a ribbon crown, against a dark background. — Voltaire *Voltaire*, plaster sculpture by Jean-Antoine Houdon; in the Los Angeles County Museum of Art, California.

Voltaire’s defense of Jean Calas was a pivotal moment in the fight for justice and human rights. After Calas, a Huguenot merchant, was wrongfully executed following the death of his son, Voltaire was alerted to the case by the family's supporters in Geneva.1

Recognizing that the verdict was driven by anti-Protestant prejudice rather than evidence, Voltaire launched a vigorous press campaign to sway public opinion across Europe. He argued that the judges had allowed religious bias to corrupt the legal process, effectively turning the case into a symbol of the need for criminal law reform and religious toleration.1

Voltaire’s tireless advocacy was morally essential, as it challenged the systemic bigotry of the time and demanded that the state uphold the principle of impartial justice. His efforts successfully pressured the government to appoint a 50-judge panel to review the case, which ultimately reversed the conviction in 1765 and provided an indemnity to the Calas family.1