By examining general age-related changes and critical life events, Intentional Self-Development and Positive Ageing explores the adaptive cognitive-motivational processes that generate positive development in adulthood, including developmental tasks, cognitive changes, life-stage transitions, and biological and neural processes. Leipold goes on to discuss the concept of positive ageing, highlighting the flexibility of the term and evaluating it from multiple perspectives to demonstrate its subjectivity, as well as its importance. This text also discusses the importance of resilience in positive development, contributing to the search for conditions conducive to positive life conduct across the lifespan.