It exists only in human brains. The future is a new invention in evolution. It is precious. We must use all our scientific artifice to protect it. It may sound paradoxical, but if we want to sustain the planet into the future, the first thing we must do is stop taking advice from nature.
Nature is a short-term Darwinian profiteer.
In any case, science isn't all bleak. Nor, by the way, is science an arrogant know-all. What saddens me most, Sir, is how much you will be missing if you turn your back on science. It is The Demon-Haunted World by the lamented Carl Sagan. Science as a Candle in the Dark.