Each one of us is responsible for the whole of humankind. We need to think of each other really as brothers and sisters and to be concerned for each other’s welfare. Rather than working solely to acquire wealth, we need to do something meaningful, something directed seriously towards the welfare of humanity as a whole.
I don't believe an accident of birth makes people sisters or brothers. It makes them siblings, gives them mutuality of parentage. Sisterhood and brotherhood is a condition people have to work at.