Humans are a social species -- we live in groups, we take care of one another and we build civilizations together. Our ability to cooperate has been a major adaptive advantage humans. At the same time, it poses challenges for us because we affect each other’s brains -- both positively and negatively. According to neuroscientist Lisa Feldman Barrett, PhD, the fundamental dilemma of the human condition is this…. The best thing for your nervous system is another human, and the worst thing for your nervous system is another human. In her TED Talk, Feldman Barrett explains that there is a real biological benefit when people treat one another with basic human dignity, and there is a cost when we don't. She reminds us that, while we are free to speak and act as we choose, we are not free from the consequences of what we say and do.