What a pity the neanderthals went extinct! The world would be a very different place with them and us in it. Would we be at war with them or in harmony? Would we have enslaved them? It would be fascinating to see another version of human nature, possibly superior to the Sapiens version. Given that we interbred with them, would there be a lot of intermarriage now? What would their culture be like? I suspect that a genetic mixture of the two species would have produced a superior hybrid. But we will never know.