Work of fiction? Yes *applause*
Apocryphal? No.
Connected with politics? *amused laughter from audience* Some would say yes. Others (perhaps more?) would say no. One reasonable answer is "I don't know". Another is "if you like".
One word answer? No.

[IS,P!] At least as a working definition I take 'human construct' to mean something that requires the human brain for its existence. Most abstract things seem to be human constructs, but not all are. I would say that 'pain', for example, is not a human construct. There are thorny issues when we get into the old debate about whether mathematical issues are created or discovered. Is the following a human construct: on a Euclidean plane, any right-angled triangle has the property that the square on the hypotenuse equals the sum of the squares on the other two sides? I'm not sure.

(CdM) The property of plane right-angled triangles that you mention exists regardless of whether humans are aware of it or not. Maybe a better example would have been imaginary numbers which have no physical meaning until humans invented them and ascribed a meaning to them (a frequency, for example) but are a supremely useful mathematical tool.