If the OP is in his/her mid 20's, then "during their entire lifetime".
Not to be all "kids these days" about it, but millions of people read about the fall of the Berlin Wall and the Soviet Empire in their World History class, instead of living through it.
Just last week on HN I saw a comment to the effect of "I trust China over the US when it comes to political protest". That's the kind of thing people say when Tiananmen Square happened before they were born.
> If the OP is in his/her mid 20's, then "during their entire lifetime".
If they think so, then they haven't been following news too much. Russia has been invading its neighbouring countries (friendly to the USA) and organising unrest in some of them for a decade.
Not to be all "kids these days" about it, but millions of people read about the fall of the Berlin Wall and the Soviet Empire in their World History class, instead of living through it.
Just last week on HN I saw a comment to the effect of "I trust China over the US when it comes to political protest". That's the kind of thing people say when Tiananmen Square happened before they were born.