Recently psychologists have made a dramatic change in the way they approach the study of human development. Whereas researchers used to target ways of minimizing individuals' suffering and shortcomings, today we recognize this is insufficient and are increasingly focused on understanding and promoting optimal human development, or thriving. This new, more hopeful perspective on human capacity has been particularly influential with regards to the study of young people where, as leaders of the field note, being problem free is not the same as being fully prepared. Therefore research...