any person can play a role in doing their little bit to change the society, since we are the people who make the society.
if you feel that there is something to be changed, then take the first step in changing/correcting it, rather than waiting for someone else to take the initiative.
example : green peace movement - it was started by people who wanted to make a difference and today it is an international organization that prioritizes global environmental campaigns.
so, a graduate or any person has to make a start. thats all it takes to make a change.