Final answer:
A self-absorbed, nongenerative adult is at risk for stagnation according to Erik Erikson's stage of generativity versus stagnation, which occurs in middle adulthood.
Step-by-step explanation:
A self-absorbed, nongenerative adult who is not concerned with establishing and guiding a new generation will be at risk for stagnation. This concept is part of Erik Erikson's developmental stages of life, specifically the stage during middle adulthood known as generativity versus stagnation. Generativity involves finding one's life work and contributing to the development of others, such as through mentoring or raising children. In contrast, individuals who fail to invest in the growth and well-being of the next generation may experience stagnation, which is characterized by a lack of productivity, self-improvement, and connection with others.
Erikson's theory posits that in the final stage of life, the challenge is integrity versus despair, where individuals must look back on life and come to terms with their achievements and failures. Those who succeed develop a sense of integrity, while those who do not may experience despair. The task of achieving a sense of productivity and purpose is particularly pertinent in middle adulthood, contributing to a sense of generativity.
Therefore, when referring to Erikson's stages, an adult who is self-absorbed and not focused on guiding the next generation would be most at risk for stagnation. This can lead to disconnection and a reduced sense of life satisfaction.