Here's the scenario:
I have a society that has eliminated all traces of accomplishment, self-worth and emotions. People are entirely neutral, and as a result all conflicts have been eliminated.
Since there is no sense of accomplishment, achievement or self-worth (basically everyone is apathetic) people just do what they do. All needs are handled by the controllers, and everyone goes with the flow. People are assigned to certain positions, and they do them. All mental illnesses and physical ailments have been eliminated, and the society is completely peaceful, and docile.
Occasionally, a child is born that does not conform to these principles. Once the child is identified as a non-conformist, the child is killed. The parents feel no remorse for this. Very rarely will a child be born that is a non-conformist and not be killed, but it's been known to happen.
Over time, several dozen children have been born (and not identified) to be non-conformists. They have emotions and feelings naturally, and they have self-worth and goals. As a result, they wish to bring the society back to its former self, of having empathy and other emotions. The age ranges of this group of people is very vast. Some are 12, some 20, all the way up to 150 or older (another result of this Utopian society is that the life-expectancy is enormous, some people have been known to live to 200 years old). These people are also able to locate other persons who also have emotion via telepathy, and as such recruit in secret. The group currently numbers 56, with 17 other persons out there who have not been (as of yet) recruited. The society in total numbers in the tens of billions.
Some notes: there is no police force, as there is no crime. There are only "controllers" (who run the government, basically we would refer to them as parliament et al), and "enforcers" (who assign people to their respective tasks). Everyone is of super-human intelligence, and people are perfectly content doing whatever job is necessary. In contrast to many future science-fiction societies, there is no form of "tracking" of people. Everyone is implicitly trusted as the society as-a-whole believes that there are no living non-conformists.
So, the question is, how would the revolutionary group achieve its goal of bringing the society back to its emotional state? How would they remove the solidarity and apathy to help the society go back to having feelings, emotions and goals?