> The world has been getting better, and continues to get better

...and as a result of that, the world's population has been growing and growing (and the standard of living of this population has also on average improved), which leads to more CO2 emissions, a higher consumption of finite natural resources etc. etc. Now there are two possible theories:

(1) things will continue to get better, if any problems will come up along the way we will surely be able to solve them.

(2) we are accelerating towards a brick wall which we can't see yet, but when we see it it will be too late to avoid the crash.