It is possible that in the 21st Century the Earth will not be inhabited by humans. One of the great mystics of India, a very simple man up in the mountains, somebody once asked him about the future. He said there will come a time when you'll walk five miles and you may see a light and you'll be so happy to know another being exists.
I don't think too much about the future. Not because I'm hiding my head in the sand but because I figured out that whatever the future was going to be, the thing I had to do was to quiet my mind and open my heart and do what I could to end suffering.
Prolong not the past Invite not the future Do not alter your innate wakefulness Fear not appearances There is nothing more than this.