During my three years in Vietnam, I certainly heard plenty of last words by dying American footsoldiers. Not one of them, however, had illusions that he had somehow accomplished something worthwhile in the process of making the Supreme Sacrifice.
Even as I speak, the very last polar bear may be dying of hunger on account of climate change, on account of us. And I sure miss the polar bears. Their babies are so warm and cuddly and trusting, just like ours.