Jerry has been wondering what life means and whether he is living his life purposefully. if he cannot answer these questions, he will probably experience

An Existencial Crisis

Explanation:

It comes a time when all individuals get to a point to their lives when they wonder if their life is going somewhere either be in life or in the middle of a career or any mid-path or half-way project; it could be anywhere, anybody at anytime, though this is a precise stuck-in-the-mud epoch where one cannot have any idea, value, purpose or meaning his/her steps are heading to.

answer; the changing age structure of the population;