Not wanting to have a go here but this is example of Eurocentric point of view.
For many WW2 did not end in 1945. The new human rights post 1945 did not apply to colonial people. So across the world fighting did not stop. Malaysia / Indonesia / Vietnam.
To avoid it being under the new human rights post WW2 wars were labelled for example in Malaysia " The Malaysian Emergency". ie policing actions rather than wars which might come under the new post war human rights.
The Mau Mau rebellion is another example
MAD was not about stopping wars. It was about European/ Russia / US not destroying each other. Proxy wars were fought.
Palestine/ Israel is a case in point. With demise of Ottoman Empire post WW1 the Palestinian Arabs found self determination was not for them. The Balfour declaration saw to that.
Rashid Khalidi ( very good) history of this is called The Hundred Years War on Palestine
The title and book shows war on colonial peoples has been going on and on. Occupation by British and the Mandate ended up as a disaster for Palestinians.
Im afraid when I hear people going on about fear of WW3 its about that coming to Europe and US. And affecting their populations.
Wars have never ended for some peoples outside the privileged US/ Europe and USSR.