War is failure of diplomacy.

All war represents a failure of diplomacy.

Nature is not simply a technical or economical resource and human beings are not mere numbers. To suggest that one can somehow align all the squabbling institutions of science environmental management government and diplomacy in an alliance of convenience to regulate the global climate seems to me optimistic.

Diplomacy n. is the art of letting somebody else have your way.

To say nothing especially when speaking is half the art of diplomacy.

Diplomacy: the art of restraining power.

Diplomacy is the art of saying 'Nice doggie' until you can find a rock.