"[Esperanto] was very much the child of its times, like Theosophy, perhaps, or even Communism, which explains both its rapid spread in the early part of the 20th century as well, I think, as its eventual failure, if that's the right word, to live up to the hopes of the hopeful [Dr Ludwik Zamenhof], the founder of the movement.
...
It's also unsurprising that after the nightmare of the first world war, so many people around the world were inclined, in an era of modernism, to imagine peace in universalist terms.
A century later, we live in a rather different world, one where diversity (in dialects, ethnicities, customs, beliefs) is widely celebrated as a very fine thing, while anything that smacks of a grand narrative (a universal truth, a universal movement, anything hegemonic) is regarded with suspicion, although not universally, naturally."
(Robert Dessaix, 21 January 2006, ABC Australia)