As historian of science Lorraine Daston recently remarked, COVID-19 has thrown us back into a state of “ground-zero empiricism.” The manifold manifestations of COVID-19 and the many unknowns involved are provoking scientific speculation that is often based on nothing more than chance observations and personal anecdotes. The radical uncertainty of the current situation, writes Daston, has catapulted us back to the seventeenth century, with almost everything up for grabs, “just as it was for the members of the earliest scientific societies—and everyone else—circa 1660.”1
Europe in the 1830s and 1840s was marked by political ferment, with various kinds of nationalism and political ideology challenging the international system established by the Congress of Vienna in 1814–15. One potential tool at the disposal of revolutionaries was public opinion abroad, insofar as the international order depended on enforcement by the great powers—Prussia, the Habsburg monarchy, Russia, France, and Great Britain. The last of these was particularly interesting for those on the Continent with a national or liberal agenda because it offered a safe haven for political exiles, its press laws were liberal, and it had a sizeable educated and moneyed public that was interested in constitutional and national questions—a public that might sway government policy or offer financial and moral assistance. Lucy Riall has highlighted the role played by the media and public opinion campaigns in Great Britain during Italy’s struggle for national independence.1 Poles too sought to use such tools.