his special issue brings together seven contributions which, in spite of the diversity of the topics and theories being covered , all make use of Self - Determination Theory (SDT) as their guiding , complementary , or contrasting framework. In this commentary we first reflect on how SDT has develope d organically and conservatively from “within ,” based on emerging patterns of evidence, as well through ongoing challenges from other models and frameworks. W e then discuss each of the various contributions to this special issue , addressing themes that inc lude SDT’s breadth of methods, and its relevance to topics such as narcissism, wisdom, individual differences, big - five traits, and the neuropsychology of motivation, among others. Across these discussions we highlight fruitful avenues for research and cross - fertilization across the fields of personality, developm ent, motivation , and neuroscience . At the same time, we counter some claims made about SDT, and forward certain cautions regarding the integration of SDT and other personality frameworks and models . We conclude by revisiting the value of broad theory for coordinating complex research findings across levels of analysis, and perhaps more importantly , for pointing us to the right questions.