Function of Features of Facial Expressions -- Facial Expressions as Behavior Regulators -- Functions of Smiles in Dyadic Interaction -- Social Functional Theories -- Social Coordination Function for the Group -- Group Formation -- Bringing Group Members Back into Line -- Group Governance -- Collective Action -- Summary -- 5 Expression of Emotion -- The Mechanics of Facial Expressions -- Origin of Facial Expressions -- Evolution and Function of Facial Expressions -- The Question of Cultural Universality -- What Facial Expressions Convey: Emotion Readout Versus Social Motivations -- Facial Expressions Influence the Experience and Perception of Emotions -- Embodied Simulation and Emotion Perception -- Beyond the Face: Other Components of Emotion Expression -- Bodily Expression of Emotion -- Emotion in the Voice -- Combining Emotion Expression Components in Context -- Summary -- 6 Self-Conscious Emotions -- Defining Self-Conscious Emotions -- Cognitive Achievements Underlying Self-Conscious Emotions -- Self-Evaluative Emotions -- Guilt and Shame -- Embarrassment -- Pride and Hubris -- Social Comparison Emotions -- Envy -- Jealousy -- Summary -- 7 Happiness -- What Is Happiness? -- What Does Happiness Do? -- How Does Happiness Do That? -- Do You Really Know What Makes You Happy? -- Affective Forecasting -- Impact Bias -- Memory Bias -- Hedonic Adaptation -- Social Comparison -- Cutting Up the Happiness Pie -- Biology -- Life Circumstances -- Daily Life -- Behaviors That Increase Happiness -- Gratitude -- Savoring -- Mindfulness -- Positive Relationships -- Generosity and Helping -- Optimism and Defensive Pessimism -- Summary -- 8 Emotion and Cognition -- Mental Representation of Emotion Knowledge -- Emotion Shapes Perception -- Emotional Objects Capture Attention -- Emotion Influences the Scope of Attention -- Emotion-Congruent Word and Face Processing