Desiderius Erasmus Roterodamus was a Dutch philosopher and Catholic theologian who is considered one of the greatest scholars of the northern Renaissance. As a Catholic priest, he was an important figure in classical scholarship who wrote in a pure Latin style. Among humanists he enjoyed the sobriquet "Prince of the Humanists", and has been called "the crowning glory of the Christian humanists". Using humanist techniques for working on texts, he prepared important new Latin and Greek editions of the New Testament, which raised questions that would be influential in the Protestant Reformation and Catholic Counter-Reformation. He also wrote On Free Will, In Praise of Folly, Handbook of a Christian Knight, On Civility in Children, Copia: Foundations of the Abundant Style, Julius Exclusus, and many other works.
Erasmus lived against the backdrop of the growing European religious Reformation. He remained a member of the Catholic Church all his life, remaining committed to reforming the Church and its clerics' abuses from within. He also held to the doctrine of synergism, which some Reformers rejected in favor of the doctrine of monergism.