Felix, Mihir and their colleague Kathleen McGinn discuss the role of gratitude at work and at home. Gratitude can be incredibly effective, so why don\u2019t we thank others more often? What goes wrong when a thank you seems shallow and inauthentic? Can gratitude even be an impediment to change? Plus, we debate early retirement. Clearly, it is what people want. Why don\u2019t we give it to them?