Humans are killing the planet. Every single political or economical system tried over last 100 thousands of years, resulted k in humans destroying environment for short-term benefits.
Hunter-gatherers destroyed most of megafauna. Ancient Greeks destroyed forests of Greece. Medieval Germans destroyed forests of Germany. French and English did it too. Aurochs were destroyed in modernity. Soviets destroyed Aral Sea.
This isn't even limited to our species - algae almost destroyed life on Earth, because they found that funny photosynthetic pathway and started emitting O2 to atmosphere.
The very problem is that humans are form of life and restraining ourselves or worsening quality of life "for next generation" goes against basic instincts and behaviours built by evolution in mammals.