300 years before globalized communication and long before Facebook and Instagram, Leibniz had "friends" all over the world - more than 1,300 mail partners. For the cultural scientist Joseph Vogl from the Humboldt University in Berlin, Leibniz's way of working was something of an "information processing machine". Most of his estate is in Hanover, where Leibniz worked as a librarian and consultant at the Duke's court for 40 years. Leibniz has written so much in his life that so far only a part of ...