Theories in motivation science, and in psychological science more generally, are in a state of fragmentation that impedes development of a robust body of knowledge. Furthermore, fragmentation hinders communication among scientists, with practitioners, and with policymakers and the public. Theoretical integration is needed to overcome this situation. In this commentary, I first provide an overview of the integrative frameworks presented in this collection of articles. Based on this overview, I discuss if and when we should integrate theories. Several non-trivial conditions need to be met for integration, including convergence of phenomena, constructs, and theoretical propositions. Next, I address strategies for integration, including rules for merging constructs and ways to integrate propositions. I also discuss how the generation of integrative frameworks, if not successfully enacted, can paradoxically lead to further proliferation rather than a reduction of theories. In contrast, successful integration reduces redundancy and simplifies the conceptual space used to describe, explain, or predict a set of phenomena. Successful integration may require not only theoretical work but also empirical validation, strategic efforts in the scientific community, and change of institutional policies. In conclusion, I argue that within-discipline integration alone is not sufficient to overcome the current theoretical stagnation in the field. Attention to advances in neighboring disciplines, formalization of models of motivation, and theoretical differentiation to consider the specificity of constructs, populations, and contexts are needed as well.

动机科学以及更广泛的心理科学中的理论处于支离破碎的状态，阻碍了强大的知识体系的发展。此外，碎片化阻碍了科学家、从业者、政策制定者和公众之间的沟通。需要理论整合来克服这种情况。在这篇评论中，我首先概述了这组文章中提出的综合框架。基于这个概述，我讨论我们是否以及何时应该整合理论。整合需要满足几个重要的条件，包括现象、构造和理论命题的收敛。接下来，我将讨论整合策略，包括合并结构的规则和整合命题的方法。我还讨论了整合框架的生成如果没有成功实施，如何可能矛盾地导致理论的进一步扩散而不是减少。相反，成功的集成减少了冗余并简化了用于描述、解释或预测一组现象的概念空间。成功的整合可能不仅需要理论工作，还需要实证验证、科学界的战略努力以及机构政策的改变。总之，我认为仅靠学科内整合不足以克服该领域当前的理论停滞。还需要关注邻近学科的进展、动机模型的形式化以及理论分化，以考虑结构、人群和背景的特殊性。