We shouldn't deny the 'existence' of these problems. [=we shouldn't deny that these problems are present or real]
long before the country had 'come into existence' [=begun to exist; come to have actual being]
I owe my very 'existence' [='life'] to their courage. [=I am alive because of their courage]
(..) Would those qualities have made for a good king in your learned opinion? Until your marriage to Khal Drogo, Your Grace, I knew nothing about you, save your existence and that you were said to be beautiful. So you and your friends traded me like a prized horse to the Dothraki. Which you turned (..)2017 TvShow: Game of Thrones Title: Stormborn Season: 7 Episode 2