In most places on earth, life generally isn't great. OLD TECHNOLOGY, OLD CITIES, ETC.
THE POSSIBLE FUTURE OF NEW YORK CITY, EARTH
ADVANCED SHUTTLE FLYING ON FUTURE EARTH (NYC)
If you help humanity to further advance technology, we could have a future like the one displayed in the images above. Technology doesn't automatically advance and improve by itself, it's human effort that makes it better.
You can directly accelerate innovation worldwide. Your impact may not be huge, but it would still matter. By simply working for or starting a company that directly accelerates innovation in key industries, you're helping humanity get to a beautiful and highly advanced future.