I feel that the rise of populism like Trump and Brexit, and the breakdown of the liberal world order, and democracy itself, are fundamentally important issues.
That said, they're so important that they could very easily 'crowd out' all the other news here, and there are many other places to discuss these things, so despite - or rather because of - their importance, these issues should probably be kept off of HN.
And truth be told, it's time to stop chatting and start getting personally involved to counter this crap.