What was it about the 20th century that led to two World Wars and a war so deadly that one wrong decision could've led to earth's destruction?
Was it the growing population vs decreasing resources? The clashing ideologies? Or was it the next step in our evolutionary path? It did hasten our development in technology and led to the formation of organizations dedicated to safeguarding peace.
That's just a meme to make your gay ass pay attention in class. Such a gainless nuclear order would have to go through military officers who refused it multiple times
Human Stupidity
I am suprised people do not realize how bloody the cold war was. Remember, it includes things like vietnam/korea, countless genocides, over ten coups, random air force engagements