decrease threatening facial displays: S. D. Holman, and R. W. Goy, “Experiential and Hormonal Correlates of Care-giving in Rhesus Macaques,” in
Little domestic chicks: J. Panksepp, E. Nelson, and M. Bekkedal, “Bain Systems for the Mediation of Social Separation-Distress and Social-Reward: Evolutionary Antecedents and Neuropeptide Intermediaries,” in
the physiological underpinnings of love, devotion, and trust: For an accessible review of the literature on oxytocin, see K. U. Morberg,
In studies of lactating women: E. B. Keverne, “Psychopharmacology of Maternal Behavior,”
Prepartum mothers who show higher baseline levels of oxytocin later showed increased attachment-related behavior: R. Feldman et al., “Evidence for a Neuroendocrinological Foundation of Human Affiliation: Plasma Oxytocin Levels Across Pregnancy and the Postpartum Period Predict Mother-Infant Bonding,”
Gian Gonzaga and I undertook a Darwinian study of sexual desire and romantic love: Gonzaga et al., “Love and the Commitment Problem in Romantic Relations and Friendship.”
We next turned to a query of our chemical quarry, oxytocin: G. C. Gonzaga et al., “Romantic Love and Sexual Desire in Close Bonds,”
In her cultural history: Barbara Ehrenreich,
Zak proposes that oxytocin is a biological underpinning of trust: M. Kosfeld et al., “Oxytocin Increases Trust in Humans,”
the love of humanity: B. Campos, M. A. Logli, and D. Keltner, “Love of Humanity,” unpublished manuscript.
the health of communities depends on trust and the love of humanity: Robert Sampson, “The Neighborhood Context of Well-Being,”
children prove to be much more resilient in the wake of their parents’ divorce when they feel a sense of connection: For several essays on more peaceful divorce, see Jason Marsh and Dacher Keltner, ed., “The 21st Century Family,”
loving relations get more important, and love all the sweeter: L. L. Carstensen and S. T. Charles, “Emotion in the Second Half of Life,”
romantic love dips: Helen Fischer,
I would ask them to read: Stephanie Coontz,
to arrive at that magic ratio of five positive feelings for every toxic negative one that enables marriages: Gottman,
It is a kelson of creation:
COMPASSION
historian Jonathan Glover documents many such “sympathy breakthroughs”: Jonathan Glover,
As Charles Darwin developed his first account: Darwin,
Other influential thinkers in the Western canon: Nussbaum,
“A feeling of sympathy is beautiful and amiable”: Immanuel Kant,
“If any civilization is to survive”: Ayn Rand, “Faith and Force: Destroyers of the Modern World,”