Apparently none. Of course you can tell stories, but it's not as if we know exactly how grief has (or hasn't) benefited humans from an evolutionary point of vie

Apparently none. Of course you can tell stories, but it's not as if we know exactly how grief has (or hasn't) benefited humans from an evolutionary point of view. We can't create genetically modified humans who don't experience grief and then rear them in a parallel environment to see if they have more or less reproductive success than regular humans. So who knows? Nor is it safe to assume that any existing trait must confer an evolutionary benefit. Evolution isn't a perfect optimizer, and it's an ongoing process without a terminus. All kinds of traits in the current human population might turn out to be evolutionarily disadvantageous and scheduled for elimination via natural selection in the long run. We won't be around to find out.