The Neanderthals didn't do art. They didn't do trade either. We know this because the objects we find in their settlements were all sourced locally. Human settlements, on the other hand, are full of objects sourced from hundreds of miles away. This is almost certainly a factor in our survival and their demise. We had developed a "social brain"; they hadn't. They lived in isolated small groups; We lived in communities that communicated and interacted and exchanged goods, information and technology.
It's because of things like this- because we're clearly such a resilient bunch- that I refuse to get hysterical about climate change. We've coped with it before; we'll cope with it again. Our earliest ancestors migrated from the forests and grasslands of Ethiopia to the frozen steppes of Southern Russia and not only dealt with the radical change of environment but thrived. Maybe the earth is warming, maybe we're helping the process along, but whatever we do or don't do now this is a volatile planet we're living on and change is bound to come- if not tomorrow then the day after tomorrow- and if we've got half the spirit our ancestors had we'll adapt and make a go of it.