We are told that the world is at a tipping point with many animals threatened with imminent extinction. Polar bears are mentioned in today's papers along with ivory gulls, Pacific walruses, ringed and hooded seals and narwhals, small whales with long, spiral tusks. These can be added to elephants, white rhinos, tigers, panda bears and so on. My question is, objectively, does it really matter? Emotional considerations aside, isn't it the natural order of things that species die out and others emerge? Dinosaurs disappeared as did some 70% of all life on the planet, we're told, after some cataclysmic event 60 million years ago. Humankind may not have emerged on this planet if many species hadn't disappeared. I realise it will be a great loss that some, if not all, of these species disappear and we should do everything we can to prevent their demise by our actions. But it's doubtful that we can really save them, except for a few in well-protected zones or nature parks. Some, like bees, which have a critical role in keeping our food chain going, and hence our very survival, must be protected at all costs. Similarly with types of fish that we, humans, rely on for food. We must do our utmost to preserve these animals and insects and also plants, using seed banks, and trees for fruit and oxygen, that are necessary for the survival of the human race. Other animals and plants, which merely look pretty or cute, are probably dispensible.