The Zettelkasten of Public Engagement

If you’re having trouble writing a book — or writing anything — I have one weird word for you:

Zettelkasten.

No, it’s not a curse by a Teutonic troll. It’s an approach to note-taking and knowledge cultivation that the late sociologist Niklas Luhmann used to write more than 70 books and almost 400 scholarly articles.…