How do the characters in Brave New World develop throughout the book? Provide examples.

Most of the characters in Brave New
World are static and flat: they are undeveloped and do not change because
they are born into and conditioned to be in a caste system.  This is especially true of
the female characters, Lenina and Linda, who are superficial, addicted to pleasure, and
have no real sense of identity or femininity.  It is also true of the Director, Mustapha
Mond, and Henry Foster, all of whom seek to protect their positions at the top of the
caste system.

The only two characters who change and are
self-aware are Bernard and John.  Whereas Bernard rebels against the values of the
"utopia" at the beginning, John rebels against them at the end of the novel.  As the
novel progresses, the two switch roles: Bernard loses his courage to rebel, and
John succumbs to the pleasures of "orgy-porgy."  Knowing that he is forever lost in this
new world, John kills himself--becoming a kind of tragic-comic hero.  Of course, Huxley
exaggerates all the behaviors of his characters in order to show the effects of
government mandated birth control, unbridled mass media, addiction to drugs and
pleasure, and the remediation of books as the basis for
education.