What is the point of conditioning?Brave New World by Aldous Huxley

In the New World, genetic engineering is used from the
onset of life,and the design and the conditioning of the individual is essential for
social stability. With the main goal of the New World society being happiness,
conditioning enters into the lives of the residentsin their childhood, in the form of
sleep conditioning, or hypnopaedia.  During this sleep conditioning, children are taught
to like the members of their own caste and to dislike some of the others; in this way,
they will not associate with other castes. 

Conditioning
exists in many areas, such as in the New World culture in which love, marriage, and
parenthood are scatological; that is, they are like jokes about excrement.  In this
manner, no one will respect these states, nor want to enter upon them.  Another way in
which members of the New World are conditioned in their behavior is through the use of
soma, named after a Hindu hallucinogenic drink.  This drug is used
by the officials when they need to repress any agitated emotions of the
people. Soma assists in adding to the contentment of the
people.