Stability

In this brave new world, one of the three big factors to make the system safe is stability. But how can you make sure that your state is safe? First, we have to understand what is instability for them.
1. Emotions...they could lead us to stupid thoughts and actions. Sometimes i think thats correct.
How can they bend emotions?
They can reduce the consumption of the oxygen while a clone is breeded. The lower the caste=the lower the oxygen=the lower your emotions. Control everywhere.

2.Education: way to stupid things, too. So they wiped out everything which came before Ford and only teach the new clones what they shall know.

3.free thinking: imagine a single clone who teachs others to free them from the "slavery" of the brave new world. Whats to do? stop the free thinking of each clone while he is asleep. Hypnopaedia is used by the controlers of the brave new world, so each human being becomes conditioned to think the same.

4.happiness?? i think each clone would be unhappy if he would know whats happening to him he would be totally angry. so some clever head of the brave new world invented the soma-drug and each clone shall take some soma to become happy if he is thinking too much.