LOCATION TBD—EXPRESS OPINIONS HERE:
http://tiny.cc/chicago-meeting-places (google doc)

BACKUP LOCATION (SCHELLING POINT)—Chicago Athletic Association (Hotel) bar/lobby, 2nd floor.

TOPIC & READING (Critical Phase Transitions in Social Behavior)
1. On critical thresholds and cultural/scientific diffusion: https://www.meltingasphalt.com/interactive/going-critical/
2. A second reference on critical thresholds: https://science.sciencemag.org/content/360/6393/1116
3. Look up the definition of "phase transition"