People didn’t always follow their best interests. Human beings were distressingly bad at risk analysis, lousy with hidden motivations and neuroses, anything but the clean rational actors that economists or diplomats wanted so desperately to believe in, and diplomats had to go by capabilities, not intentions. In dealing with the Muscovite diplomats in residence the Party officials must feel as if they were handling a hungry and aroused venomous snake, one that could turn on them and bite at any moment.