[dale_glass]

An argument about an old book, like LOTR, maybe.

Though this only works because the politics of Tolkien's time have been mostly forgotten. LOTR is intensely influenced by politics, some extremely hamfisted (eg, how the Shire is ruined by all the industrialization), but in many cases one side decisively lost the argument to the point that few remember there was even anything to argue about.

That's still not a guarantee though. Those topics didn't magically disappear, and you can still run into the odd person who'd care to argue for the side that lost.