What is the significance of A Raisin in the Sun's ending?

The
significance of the ending of  is that in many ways it becomes a
reaffirmation of the family's traditional pride.

The crisis of the play
occurs whenloses the insurance money inherited from his father because he allows himself to be
duped by Willy Harris who has run off with both Walter's and his sister's shares. Knowing how he
has disappointed his mother, Walter is so ridden by guilt, disillusion, and self-disgust that he
decides to phone Mr. Lindner. Having reached the nadir of his life, Walter tells this
representative of the residents of Clybourne Park that his family will take the money offered
them to not move into the new neighborhood. 

But, when Walter informs his
family that he has phoned Mr. Lindner and told him that his family will take the pay-off money,
Mama speaks,

MAMA: Yesdeath done come in this here house.
(She is nodding, slowly, reflectively.) Done come walking in my house on the lips of my
children.

declares that Walter Lee is no brother of
hers, and, hearing this, Mama chastises her for saying such words. Beneatha reminds her mother
that she taught her children to have some pride. Mama then reminds her:

MAMA: But, I thought I taught you something else too ... I thought I
taught you to love him.

Soon, Mr. Lindner arrives, and
Walter emerges from the bedroom. He falters, but he tries to explain to Mr. Lindner that his
family has phoned him to let him know something. He tells this representative for Clybourne Park
that his father nearly beat a man to death for having called him a bad name and insulted
him. 

WALTER: I meanwe are very proud people. And that's
my sister over there and she's going to be a doctorand we are very proud....And we have decided
to move into our house because my fathermy fatherhe earned it for us brick by brick.

A nervous Mr. Lindner then tries to appeal to , but she merely
tells him that he has heard her son, and they are moving. She adds that there is nothing left
for her to say about the matter.

After Beneatha steps outside, Mama speaks
towoman-to-woman about her son, who has already gone out:

MAMA:  He finally come into his manhood today, didn't he? Kind of like a rainbow after
the rain.
RUTH (biting her lip lest her own pride explode in front of Mama): Yes,
Lena.

Significantly, the family is again intact, and
Walter Lee has regained some dignity. Most importantly, he has put aside his pipe-dreams, and he
has reaffirmed the values of his family and his responsibilities to them. Now, the family is
reunited and is whole again.