Richard A. Settersten is Professor of Human Development and Family Sciences and Endowed Director of the Hallie Ford Center for Healthy Children and Families at Oregon State University, USA. His research examines transitions across the life course, and has most recently focused on the longer and more uncertain process of becoming an adult today.Megan M. McClelland is the Katherine E. Smith Professor of Healthy Children and Families in Human Development and Family Sciences at Oregon State University, USA. Her research focuses on optimizing children's development, especially as it relates to children’s self-regulation from early childhood to adulthood.

• Introduction: Just One Wish for the Study of Human Development Part I: Conceptual Advances 1. Taking Conceptual Analyses Seriously 2. On the Need to Seriously Challenge the Empiricist Side of the Nativist–Empiricist Debate 3. Eliminating Genetic Reductionism from Developmental Science 4. How Can Developmental Systems Theories Cope With Free Will? The Importance of Stress-Related Growth and Mindfulness Part II: Systems, Levels, and Contexts 5. An Observatory for Life Courses: Populations, Countries, Institutions, and History 6. Toward a Vigorous Incorporation of Culture in the Study of Human Development 7. Right in Front of Us: Taking Everyday Life Seriously in the Study of Human Development 8. Relationships in Time and the Life Course: The Significance of Linked Lives Part III: Individual Differences 9. Tracing Three Lines of Personality Development 10. Towards a New Synthesis for Development in Adulthood 11. Why Should Cognitive Developmental Psychology Remember that Individuals Are Different? Part IV: Methodological Advances 12. Fellow Scholars: Let’s Liberate Ourselves from Scientific Machinery 13. Toward an Empirically Robust Science of Human Development 14. Getting at Developmental Processes Through Experiments 15. Methodological Practice as Matters of Justice, Justification, and the Pursuit of Verisimilitude Part V: Harnessing Science for Human Welfare and Social Justice 16. Human Developmental Science for Social Justice 17. Understanding and Watering the Seeds of Compassion 18. Research that Helps Move Us Closer to a World Where Each Child Thrives 19. Mothering Mothers Part VI: Underexplored Life Course Dynamics 20. Toward a