That was true in the WW2. Access to energy being another big factor. Germany and Japan were essentially cut off from oil. There will never be major conflict

That was true in the WW2. Access to energy being another big factor. Germany and Japan were essentially cut off from oil. There will never be major conflict between nuclear powers where decisive victory is possible. There can only be limited regional conflicts that are won or lost. If the stakes become higher than that, it will be tie or everybody loses. The idea that US, Russia or China could surrender is not reality.