This loneliness is different from the pervasive loneliness that ten to thirty percent of the population reports feeling. It differs from the existential angst of accepting our ultimate aloneness. It is often in the background as a kind of white noise of continuing and past involvement. Once it's experienced, it is impossible forget. Unless one can find a few other human beings who have shared the collective consciousness of mass activism through individual action, the world becomes less hospitable.
Conversation reduces to pleasantry and trivia and becomes a poor substitute for dialog.
Boredom becomes mundane and the mundane becomes boring. Fortunately, I believe that more and more people are finding others in solidarity. Every day, it is becoming more and more common. New Democracy makes the claim that it is the competitive nature of scrambling for jobs which places good people, both liberals and conservatives, on opposites side of the divide. The case is then made that there is no divide.