It's exhausting to see people I respect wasting their time arguing about whether global warming is caused by mankind, or even whether global warming is real. Or to hear them arguing about which religion has a better set of values for people to live by or which one is the one their country is based upon.
The fact is that if we want to survive and live happily and successfully in the long run we must stop such idiotic bickering and make some changes. Our population growth and our way of feeding, housing, energizing, and transporting that population is simply unsustainable in the long run - regardless of whether population stays the same or grows or even shrinks a little. We're absolutely doomed if we don't change our ways of living.
But I said this was a positive vision. Ahem.
The positive outlook for humanity is clear. We must reduce the impact on our environment made by the processes of human life even while we enhance the quality of that life. We're definitely making progress on both fronts.
But we must change our ways. The article linked from the photo above has a lot of hope to offer for ways we can and will change.