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Anyone who says that isn't aware of how many wars there used to be. See[1] and look at the countries and regions involved, and how in this century it's down to a very very few regions. Since WWII, Europe has been incredibly peaceful after centuries of invasions, border conflicts, revolutions, empires rising and falling.

Pointing to one thing going wrong so you can call people 'privileged' doesn't change it. Nuclear Mutually Assured Destruction (MAD), NATO, the EU, the USA, the generally calm dissolution of the British/French/Spanish empires, the end of new lands to find, has stabilised a lot.

[1] https://en.wikipedia.org/wiki/List_of_conflicts_in_Europe