In Darwin's first book about humans, he argued for "the greater strength of the social or maternal instincts than that of any other instinct or motive." His reasoning was disarmingly intuitive: in our hominid predecessors, communities of more sympathetic individuals were more successful in raising healthier offspring to the age of viability and reproduction -- the sine qua non of evolution. One year later, Darwin showed how our moral sentiments are expressed in mammalian patterns of behavior. To be a mammal is to suffer. To be a mammal is to feel the strongest of Darwin's instincts -- sympathy. Join Dacher Keltner who will detail the evolution and neurophysiology of compassion and kindness, and share his and other researchers’ work that proved two of Darwin’s hypotheses true: sympathy is indeed wired into our brains and bodies; and it spreads from one person to another through touch.