Well... Jack and Jill -> French Revolution is a fairly well documented link
... although probably a false one. The poem was first published 'Mother Goose's Melody' in the 1760s - Louis didn't get the chop until the end of the century.
That statement is either so deep it would take a lifetime to fully comprehend every particle of its meaning, or it is a load of absolute tosh. Which is it, I wonder?
Terry Pratchett, Hogfather