From the origin of human history, this is uncountable times war happens because of food. But now times have changed. Currently, there is plenty of nutrition for most of the people of our world. And this food exchanging makes love one nation to another nation. Even some of the people leave their country because of a love for food.
On the other hand, some people have research for this food. For example, 200 years ago, maybe there was only one type of bread available globally. But now, more than 100 variants of bread are available in the world because of this research. And yes, this sweet love for food is charming.