"Runaway cynicism is turning our world into a meaner, sicker place; director of the Stanford Social Neuroscience Lab, Dr. Jamil Zaki, is about to disrupt this narrative. For thousands of years, people have argued about whether humanity is selfish or generous, cruel or kind. In 1972, half of Americans agreed that most people can be trusted; by 2018, that figure had fallen to 30%. Different generations, genders, religions, and political parties can't...