late 14c., "nearness in relation, kinship," later also "physical nearness" (early 15c.), from Old French propinquite (13c.) and directly from Latin propinquitatem (nominative propinquitas) "nearness, vicinity; relationship, affinity," from propinquus "near, neighboring," from prope "near" (enlarged from PIE *pro "before;" see pro-) + suffix -inquus.
Nothing propinks like propinquity [Ian Fleming, chapter heading, "Diamonds are Forever," 1956; phrase popularized 1960s by U.S. diplomat George Ball ]
[ Online Etymology Dictionary - n.b. added links ]
He often used the aphorism (perhaps originally coined by Ian Fleming in Diamonds are Forever) "Nothing propinks like propinquity," later dubbed the Ball Rule of Power. It means that the more direct access you have to the president, the greater your power, no matter what your title actually is.
[Wikipedia @ George Ball, note omitted]
On Books the Diamonds are Forever can be found (such as here with the cover of The Diamonds Smugglers, which is Mr Fleming's non-fiction work from the research for the novel); in it, there is the aforementioned heading. When you scroll a few pages down, you have the following:
[Felix]Leiter Chuckled. "Come on lovebirds," he said, looking at his watch. We ought to get going. I've got to get back to Vegas tonight and start looking at the skeleton of our dear dumb friend Shy Smile. And you've got your 'plane to catch. You can go one quarreling at twenty thousand feet. Get a better perspective from there. May even decide to make up and be friends. You know what they say" - he beckoned to the waiter - "nothing propinks like propinquity."
Bond knew that he was very near to being in love with this girl.[...]
[Ian Fleming, Diamonds are Forever, 26 March 1956/UK]
I don't know the novels, but Felix making some sort of insinuation is not necessarily out of character from what I remember of the movies; I construe the reference as such. But for a U.S. diplomat of the (President)Eisenhower era to be using exactly that and then having the Ball Rule of Power being coined after it strikes me as somewhat odd. Or is it?
Who came up with "nothing propinks like propinquity" (if not for Mr Fleming); is that "heading" from the novel really the basis for Mr Ball using it and for the Ball Rule of Power being coined?