Beheading the King
Putin is not a "psychopath". It is the result of his environment. And to solely blame him, is the old "beheading the king" approach.
Blaming people, corporations, or governments, is a dead end. We will never understand what makes those humans, or human groups, do whatever they do. Protection from them, in case of aggression, could be necessary. But stopping at that is foolish.
How about we start to inform the world that we are one species? No Ukrainians, no Russians, no Americans, no Europeans and so forth. Then how about we provide a basic life for all humans? Give them their basic needs as trade free. This way you create a good and fertile soil for calm, relaxed, and educated minds that can take better decisions and not be coerced so easily.
Imagine all of these soldiers, going out there feeding the world, building houses for those in need, provide medical care. Then why would anyone want to go to war? And with whom?
We are one species, one planet, one human race. We face the same problems, we have the same challenges. We need to tell these to everyone. Wake them the fuck up! Let's help each other....
Else we are fucked. There will be more Hitlers, more Putins, more dictators and kings. And these are just one kind. USA, EU, and the rest, with their leaders, are also destructive, aggressive, and abusive. A bad soil is what we have, and weeds are growing instead of flowers.
Change the soil.