Name one specific example of an impact that the Cold War had on the world?

While the Cold War impacted the world in numerous ways, possibly the most visibly jarring result of the conflict was the Berlin Wall. From 1961 to 1989, this concrete and barbed-wire barrier visibly divided Western Europe and the Eastern Bloc, primarily preventing emigration from East Berlin to West Berlin, despite its official purpose of keeping Western fascism out of East Germany. Prior to the wall's construction, residents of East and West Berlin were able to freely cross the border from one side to the other; the creation of the wall restricted access to only three checkpoints, and local travelers were rarely permitted to cross at all. Soldiers patrolled the East German side of the wall with orders to immediately shoot fugitives, and numerous other preventative measures were in place. The head of the East German Communist Party announced on November 9, 1989, that the borders would be opened, and East and West Germany were reunited on October 3 of the following year. Images of German people hacking at and smashing down the wall were widely distributed in news media at the time; this was a physical and symbolic symbol of the breaking down of barriers and of the Cold War's drawing to a close.
https://www.history.com/topics/cold-war/berlin-wall