Via Andrew Sullivan:
If a nation once establishes and proclaims as its rule of conduct, that any sacrifice of interest is preferable to war, it had better at once abdicate its independence and place itself under the protection of some less Quakerlike state; for to that condition of subjection it must come at last, and it is better to get to it decently and at once than to arrive at it painfully after successive humiliations, and all the the losses and sufferings resulting from repeated spoilations – Lord Palmerston