I had a discussion with a passenger and I’m not sure how the discussion turned to glasses and then monopolies. I mentioned that I saw a program reported by 60 minute that talks about Luxottica that owns LenCrafters, Pearl Vision, and others Target and Sears Optical and Sunglass Hut that’s like high percentage 90% if you dont want this brand your only options are Walmart, Costco and Warby Parker stores. Glasses used to be geeky and cheap and now they are expensive and call eye wear.
Other monopolies around the world are Diamonds we all know they are owned by DeBeers, Corn mostly by Monsanto, Mac or PC doesn’t matter its by Quanta, and beer by InBev.
more details here about monopolies, I sure learn alot from passengers.