Final answer:
Stagnation, in Erikson's psychosocial theory, is a state of inactivity and lack of personal growth that can afflict middle adults if they fail to contribute to the development of future generations through generativity.
Step-by-step explanation:
In the context of Erik Erikson's psychosocial stages of development, stagnation refers to a state during middle adulthood (ages 40-65) where an individual may struggle with a sense of inactivity or lack of personal growth. If individuals in this stage do not engage in what Erikson termed generativity—activities that contribute to the welfare of future generations, such as raising children, mentoring, or volunteering—they risk experiencing stagnation. This stagnation is characterized by a disconnect from others, a diminished focus on productivity, and limited interest in self-improvement or making meaningful contributions to society.