Figure 1. The facial displays of police and nonviolent protestors during The Orange Revolution, Kiev, Ukraine, 2004. Photograph credit: Flower power <https://www.flickr.com/photos/kde-head/1838470/> © Vasily Fedosenko, https://www.vasilyfedosenko.com/home; license CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0/legalcode>