You make it sound like there'll be a simple right way to respond but you might be ignoring most of the practices we already have which benefit current people at

You make it sound like there'll be a simple right way to respond but you might be ignoring most of the practices we already have which benefit current people at the expense of future people. It's not so easy to decide when the future is so far off and often uncertain. We've tried eugenics but as you say, that's political suicide now. We can't seem to ban antibiotics despite them causing anti-biotic resistant bacteria. We're happy to wipe out thousands of years of cultural beliefs that have a proven history of survivability in favor of modern ideas that have only lasted a couple of generations. We keep on using medical interventions to save the lives of babies and allow them to grow up and reproduce with their defective genes. There's even popular opposition to Musk's plan to colonize Mars despite the real risk of a meteor eventually wiping out all humans on Earth. That said, there's also value in selfishly taking what we can for our present selves and maybe future generations will be able to maintain that standard or even develop technology to clean up the mess. After-all, humans already mostly depend on technology like clothing, shelter, and cooking but we've evolved to cope with those limitations.