Peter Hamish Wilson, The Thirty Years War: Europe's Tragedy, Cambridge, Massachusetts, Harvard University Press, 2009, p. 9, ISBN 978-0-674-03634-5. URL consultato il 16 giugno 2017.
«[...] it was not primarily a religious war. [...] Religion certainly provided a powerful focus for identity, but it had to compete with political, social, linguistic, gender and other distinctions. most contemporary observers spoke of imperial, Bavarian, Swedish, or Bohemian troops, not Catholic or Protestant, which are anachronistic labels used for convenience since the nineteenth century to simplify accounts. The war was religious only to the extent that faith guided all early modern public policy and private behaviour.»
