Beyond the focus on individuals: Adding environment into the redefined successful aging paradigm.

Since the origin of the Successful Aging (SA) model by Rowe and Kahn, scholars have been working on enriching the content of SA and taking actions to promote this concept worldwide. While most studies primarily focus on older individuals, only a few scholars have considered the environmental aspect of SA. However, the environment, directly and indirectly, enhances older adults' abilities to achieve SA. To measure SA comprehensively and address inequalities among older adults, this theoretical article aims to challenge current SA models by incorporating both individual and environmental aspects and proposing four measurement dimensions: inclusivity of disadvantaged groups, culture-specific adaptation, balance between physical and social environments, and dynamics of the whole lifecycle. Moreover, this article provides examples to illustrate how environment can support older adults especially those who would be defined as "unsuccessful" under the original SA model. Our proposed model would provide theoretical guidance for future research and spark new ideas for policies and programs that support every older adult in achieving SA.