Great article, but it misses two triggers: 1. Globalization. A lot of manual labour was tied to USA, not so ago to local labour. In last 20-30 years a lot of t

Great article, but it misses two triggers: 1. Globalization. A lot of manual labour was tied to USA, not so ago to local labour. In last 20-30 years a lot of things get imported from China or outsourced to India. 2. Software (briefly mentioned in original article). Previous technology advancement can give someone leverage, but software got probably the largest leverage in humankind history. Single program can automate what used to do an army of employees. Natural monopolies are common thanks to network effect, economy of scale or technological advances. Winner takes all market (e.g. Apple has almost all profits in smartphone market, Android got some market share, alternatives are niches).