Explain why Bokanovsky's Process is one of the major instruments of social stability in Brave New World?

The Bokanovsky process in Brave New World is basically
cloning. With one egg dipped in the sperm solution at the hatchery building, fertilizers
can create up to 96 identical human beings.

Being able to
control the population of the world like this contributes to social stability because
the controllers can always make sure they have enough gammas, deltas and epsilons
available to do the work that has to be done at each caste level of
society.

Without the ability to control the numbers of
people in each caste, world leaders would be at the mercy of fate, disease, or conflict
when it comes to world population.  For example, let's say it takes 20,000 epsilons to
man the waste stations. However, a deadly disease one year wiped out 1/2 of them. This
would leave the socity unstable, because there wouldn't be enough workers to complete
the tasks necessary to keep the society running.

With
Bokanovsky, however, if disease wiped out a good segment of a class, they could pop out
batches of 96 clones in a relatively short period of time, restoring social order and
making enough people to complete the jobs that need to be done.