The American experiment is the most tremendous and far reaching engine of social change which has ever either blessed or cursed mankind.

I entered medicine to use it as a vehicle for social change.

Bravery is the engine of change.

The American government policy on what we supported and subsidised in agriculture was a social experiment on a whole generation of children.

So far, what I see of Preval, he is clearly reaching out to other factions. And there are plenty of people in the business community who apparently made peace with him.

Philanthropy and social change work are at their best when they are driven by your values and connected to what you care about most.