Through the shift to pure power politics ...
... international legal structures are being destroyed; all independent countries are under threat, and general freedom, equal rights and truthful communication no longer matter: anyone who has civilians bombed and then wants to market the devastated area as an attractive beach destination, anyone who calls a country that has been invaded and is defending itself against terrorist missile attacks and land grabs responsible for the war, is justifying oppression and war and making lies an all-pervasive reality.
If only narrow self-interest and power matter, there can be no shared responsibility: existential threats to humanity, such as the climate crisis, the uncontrolled development of artificial intelligence and the risk of world war driven by an arms race, are ignored; humanity has no chance of coordinating effectively.