Some people struggle so much, but still remain unsuccessful.  They imagine to change whole world, but will not be able to change anything. Reason is, the happenings in society are not plain and simple. They are products of so many complicated interactions of huge number of human brains. Though single brain predicts something, result could be different as it comes out after so many modifications and alterations done by so many people. Therefore, there is some power which manipulates and controls the outcomes. So, the thing which we can change easily with predictable outcomes is our own thinking. Therefore, continuous positive effect could be released into the environment continuously from our side by refining ourselves. The result definitely will be positive after a long time if the effort is genuine