In what ways is Chris Keller Immature in "all my sons" ???

Probably the easiest way to approach this question is the apparent disconnect between Chris' words with his father and his words with his fiancee, Ann. In the case of the former, he appears to be adamant about his refusal to make his life solely about the material wealth of the business. In the latter case, however, he does promise to "make a fortune" for Ann. This seems to be an inconsistency that is characteristic of youthful naivete.