Are the characters in A Raisin in the Sun stereotypes?

In my mind, a stereotype reduces complexity in
characters.  It is a caricature, a way to represent someone without the intricacies and
full layers to what it means to be human.  I don't think that the characters in
Hansberry's work are stereotypes because they are shown to be round and fluid,
individuals who endure a great deal of change and make critical decisions at pointed
moments.  Walter is struggling, and like many other men of color, finds that the
personal and private worlds he inhabits possess challenge.  Yet, when faced with the
critical decision, he acts in the interests of family, rejects quick money, and stands
up for the emotional bonds that connect him.  This would defy the stereotype.  Ruth does
not have the abortion, defying the stereotype again, and recognizing that there is hope
for the new child entering the world.  Mama Younger does not disappear from the family's
decision making process, but rather invests in its future.  These are characters that
are placed in stereotypically challenging situations.  However, their actions reveal
unique individual responses to these contexts.