Wilbur is 68 years old and is sitting in his recliner reflecting on the mistakes he made, as well as his dreams that went unfulfilled. According to Erik Erikson, Wilbur is in the stage of development called:

The answer is Integrity vs. Despair.

Explanation:

Integriry vs. Despair is the last stage according to Erikson's structure of psychosocial development. It appears around age 65. During this stage, a person reflects on his own life, and must achieve a sense of satisfaction after realising it has been productive or successful. Failure to do so may result in guilt or despair.