Zweig best essayist historian

Stefan Zweig tells here the struggle between totalitarianism -at need sanguinaire- Calvin and safety of his unfortunate opponent Sebastian Castellio. Written at the time of the triumph of Nazism in Germany and Austria, it almost pamphlet obviously takes a topical moral value. The idea is interesting, laudable intention, but unfortunately this is not a real historical work because sources and citations are not specified (no bibliography!), Which does not allow us to unravel the bias ( which we ask is to join), a scientifically established objective truth. To blur adds, but perhaps it is amplified by a stringy translation, a style rather heavy and emphatic. Zweig was probably right, but to verify it is necessary to document the best actors of the early days of the Reformation. The story is indeed a science and not just literature. The great novelist what Zweig did not give his best here despite interest some of that reading.