French educator and author remembered for his systematization of the practice and faith of Spiritism. His publications on the topic include The Book on Mediums, The Spirits' Book, and The Gospel According to Spiritism.
He worked in Paris, France as a teacher of physics, mathematics, astronomy, chemistry, and anatomy.
His birth name was Hippolyte Leon Denizard Rivail; he wrote under the pen name of Allan Kardec.
After marrying Amelie Gabrielle Boudet in 1832, he converted from Catholicism to Spiritism.
At a time when Kardec was championing Spiritism, American neurologist George Miller Beard published a famous critique of the practice.