Describe the stages of adult development. It is reported that some people experience a crisis during their early or middle 40’s

Describe the stages of adult development. It is reported that some people experience a crisis during their early or middle 40’s:  Do you think the concept of a midlife crisis exists?  What factors are responsible for a midlife crisis? Does everybody experience a midlife crisis? Why or why not? Relate your answer to the adult development model you outlined in the response; provide an example to illustrate and support your answer.