From the former USSR to North Korea, from former Yugoslavia to modern-day Venezuela, all countries that have experienced communism have mayonnaise salads as an important dish, including for holiday meals. A clear pattern seems to immerge.
Some people in other countries, such as the Anglo-Saxon world, do like this dish, but it is never universally liked, to the point of being an important holiday dish, outside of places that experienced communism.
I would like to know the history of this and how mayonnaise became so important across different cultures and continents, that seemingly have only one thing in common.