This comment is a bit pithy for the reasons already mentioned and more. Humanity has never acted as one thing. There is no order to the activities required to turn things around for the world. Reintroducing a keystone species can draw more attention to an under appreciated ecosystem a la polar bear. conversely, it could make light of saving a species if we can simply reanimate it down the road. But again, there is room for all sorts of efforts. i doubt more tools and more species would be an overall detriment. i would love to see an ecosystem rev to full glory.