What was the tone of the author in A Raisin in the Sun?

In A Raisin in the Sun, the tone is
somber, depressing yet realistic. The Younger family lives in a segregated Chicago
neighborhood. The apartment is worn from too many people living in
it:

The
family's inadequate living situation is conveyed through the fact that they share a
bathroom with other tenants in their apartment house and through the fact that Travis
must sleep on the sofa in the living
room.

At times, the tone
comes across as sarcastic and critical because of the characters' dialogue. Walter
and Beneatha argue constantly. Walter believes Beneatha's dream of becoming a doctor is
not realistic. He criticizes her dream, telling her to become a nurse, which is a more
realistic dream.

Likewise, Beneatha criticizes Walter's
dream of becoming a business man. The tone is quite sarcastic and critical and realistic
during most of the play. There is definitely a lack of respect from Walter and Beneatha
for one another.

The tone is quite serious and depressing.
The Younger family has such a hard time trying to make it in life. Walter is
a chauffeur, and he resents his job. Ruth and Mama do housework and laundry for other
families. The atmosphere is gloomy, almost without hope, except for the fact that the
father's insurance check is expected in the
mail.

Ultimately, the tone changes as the future becomes
brighter for the Younger family. Mama buys a house and the characters create a tone of
hope. Although the tone is still realistic, knowing to expect controversy by moving into
an all white neighborhood, there is an excitement in the Younger family's voices as they
move into their new home.