World Health Organisation definition of mental health

Here is WHO's definition of mental health - Mental health is defined as a state of well-being in which every individual realizes his or her own potential, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to her or his community.

I wonder how many of us go with the last part "able to make a contribution to her or his community" How many of us are caught up in own world to contribute to the greater community? I guess all you have to ask is what voluntary or charity organisations do you belong to? Food for thought!