There's a new world's oldest woman

When Violet-Mosse Brown was born, there were Ottoman Empire(Current Turkey), Qing Dynasty(Current China), Kingdom of Joseon(Current Korea), Qajar dynasty(Current Iran)・・・
It's like living in the world of history. I want to ask her "What is the biggest thing we should learn from world's history?"
The answer would be the biggest reason why we have to study history at schools.

http://edition.cnn.com/2017/04/17/health/worlds-oldest-woman-trnd/index.html