Kai Kupferschmidt. Concentrating on Kindness. Science 341 (20 September 2013): 1336–1339.
Bruce J. Ellis and W. Thomas Boyce. “Biological Sensitivity to Context”. Current Directions in Psychological Science 17/3 (2008): 183–187; Johnathan D. Rockoff. “Nature vs. Nurture: New Science Stirs Debate”. Wall Street Journal, 16 September 2013, .
National Center for Education Statistics. “Student Reports of Bullying and Cyber-Bullying: Results from the 2011 School Crime Supplement to the National Crime Victimization Survey”, prepared by Synergy Enterprises, Inc., . “Learn How to Prevent Bullying in Schools”. Bullying Prevention Institute, accessed October 9, 2016, .
Rachel Feintzeig. “Nice” Is a Four-Letter Word at Companies Practicing Radical Candor”. Wall Street Journal, 30 December 2015, .
Weber Shandwick, Powell Tate, and KRC Research. “Civility in America 2013”. May 2013, .
Statistic Brain Institute. “Stress Statistics”. July 2016, .
Shandwick, Tate, and KRC Research. “Civility in America 2013”.
Rick Weissbound et al. “The Children We Mean to Raise: The Real Messages Adults Are Sending About Values”. Making Caring Common Project (Cambridge, MA: The President and Fellows of Harvard College, 2014), .