 Although De constantia was not Lipsius’s most systematic or theoretical treatment of Stoic ethics, but rather a book of practical psychology, a manual for wise living, it acquired a leading position in European thought. Going through more than eighty editions between the sixteenth and the eighteenth centuries, over forty in the original Latin and the rest in translations into a wide range of modern European languages, the treatise, which embodied elements of militant Calvinism together with arguments on free will used by the Jesuits, became common cultural property during the Baroque period, influencing scholarship, poetry and art up to the Enlightenment.