**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"