Writing in these dark times

I recently had anidea for a story.  Some 10,000 years fromnow, humanity is on the verge of extinction – for reasons – and they use all oftheir knowledge and the last of their resources to build a time machine to sendsomeone back to tell us we need to change the path we’re on.  Not a terribly original idea – I think I’vealready written four or five stories like that – but the way