In my first year, teaching argumentative writing, at Mizzou (University of Missouri) I used the annual Edge question as the foundation for the course. That year, it was: What is your most dangerous idea?
Some students took the question literally and replied by writing essays on skydiving or swimming with sharks, before I could help steer them toward the concept of an idea being socially or morally dangerous to society — Copernicus or Darwinian revolutions being examples. What idea did the students have that was perhaps subversive, I assisted. I received some incredible responses.
This year, the question is a little bit more inside baseball but still fun. Contributors from around the world, scientists and other thinkers, offer short essays that are illuminating and thought-provoking, always.
The site itself, on any given day, is worth the trip: edge.org