In honor of World Kindness Day — we’ve partnered with the Humankind team at USA TODAY for a deeper exploration on the topic of compassion. What drives us to carry out acts of kindness for total strangers and how can we actively cultivate this selflessness as a society? Abigail Marsh, Professor of Psychology and Neuroscience at Georgetown University, joins The Excerpt to talk about empathy and altruism — why we help, even when it costs us. 

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Episode transcript available here. 

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