Whence Cold War Politics?

The unsustainability of the CW/hard politics
Were they necessary because of nuclear development at that time in history, or unnecessary?
Why wouldn’t CW/hard politics be considered NM?
How CW/9/11 hard politics do/don’t fulfill NM indicators
NM as sustainable political development
NM as the norm
CW hard politics as a historical anomaly of the 20th century