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31. Keltner has tracked the roots of human
embarrassment … than to mind too
little: Dacher Keltner, Born to Be Good: The
Science of a Meaningful Life (New York: W.
W. Norton, 2009), 74–96.
32. “The type that is ‘sensitive’ or
‘reactive.’ … ‘opportunity only knocks
once’ ”: Elaine Aron, “Revisiting Jung’s
Concept of Innate Sensitiveness,” 337–67.
33. twenty-seven attributes associated:
Author interview with Elaine Aron, August
21, 2008.
34. other 30 percent are extroverts: Aron,
Psychotherapy and the Highly Sensitive Person,
5.
35. More than a hundred species … what’s
going on around them: Max Wolf et al.,
“Evolutionary Emergence of Responsive
and Unresponsive Personalities,” Proceedings
of the National Academy of Sciences 105,
no. 41 (2008): 15825–30. See also Aron,