all his ways", wrote Blainey, "but here was a virtuous one. He lived the good life and made his living in a useful way. . . . It took courage to be a Spinoza or even one of his supporters. If a handful of scholars agreed with his writings, they did not so say in public". In early modern times, the first explicit atheist known by name was the German-languaged Danish critic of religion Matthias Knutzen (1646–after 1674), who published three atheist writings in 1674. Knutzen was called "The only person on record who openly professed and taught atheism" in the 1789 Students Pocket Dictionary of Universal History by Thomas Mortimer. In 1689 the Polish nobleman Kazimierz Łyszczyński, who had denied the existence of God in his philosophical treatise De non-existentia Dei, was imprisoned unlawfully; despite Warsaw Confederation tradition and King Sobieski's intercession, Łyszczyński was condemned to death for atheism and beheaded in Warsaw after his tongue was pulled out with a burning iron and his hands slowly burned. In De non-existentia Dei he had demonstrated strong atheism: The Age of Enlightenment While not gaining converts from large portions of the population, versions of deism became influential in certain intellectual circles. Jean Jacques Rousseau challenged the Christian notion that human beings had been tainted by sin since the Garden of Eden, and instead proposed that humans were originally good, only later to be corrupted by civilization. The influential figure of Voltaire spread deistic notions to a wide audience. "After the French Revolution and its outbursts of atheism, Voltaire was widely condemned as one of the causes", wrote Blainey, "Nonetheless, his writings did concede that fear of God was an essential policeman in a disorderly world: 'If God did not exist, it would be necessary to invent him', wrote Voltaire". Voltaire's assertion occurs in his Épître à l'Auteur du Livre des Trois Imposteurs, written in response to the Treatise of the Three Impostors, a document (most likely) authored by John Toland that denied all three Abrahamic religions. In 1766, Voltaire tried unsuccessfully to have the judgment reversed in the case of the French nobleman François-Jean de la Barre who was tortured, beheaded, and his body burned for alleged vandalism of a crucifix. Arguably the first book in modern times solely dedicated to promoting atheism was written by French Catholic priest Jean Meslier (1664–1729), whose posthumously published lengthy philosophical essay (part of