What term did Erik Erikson use to describe the sense of unfulfillment and lack of contribution to future generations that some people experience during middle adulthood?

Explanation

Erikson identified 'stagnation' as the feeling of personal and social inactivity during mid-life, where individuals believe they have achieved little and have minimal impact on younger generations. This contrasts with 'generativity,' which is the positive drive to nurture and guide the next generation.