It is must, to bring a change, a man must change his individual behaviour. But I think, only individual change is not necessary. After individual change, we must strive for the collective change. We see many people, when we talk to them, they have their own world within themselves. They are discouraged ones. I never found a person, who is of Marxist or Socialistic views, in a large group. They talk of a socialist order but they are not social at all. They are social now and often.
The main purpose of the whole discussion is that, we must not suffice ourselves by correcting our individual world. We must attract the surrounding world towards the world, we have within ourselves. Because a collective will is always of a great value rather than an individual will.