More than you ever wanted to know.
Cheese, yogurt, saurkraut, BEER, sourdough bread, wine, vinegar, cultured butter, kimchi, fish sauce, kefir,..are all products of fermentation...
My guess is that long time ago, some guys milk (or cabbage) went bad...the dude was starving, ate it, survived, and realized he didn’t have to throw it away.
P.s.....spell checker for article probably auto subbed “fragmentation” for fermentation in some sentences of article.