I'm about halfway through it. The first half surveys how many powerful institutions including churches, the US education system, and companies encourage/reward

I'm about halfway through it. The first half surveys how many powerful institutions including churches, the US education system, and companies encourage/reward extroversion, perhaps without realizing it. I'm somewhere in the middle of the E/I spectrum and the book has made me reconsider how workplaces, etc. should be structured to avoid excluding people. According to the author, something like 10-30% of the US population are more on the "I" end of the spectrum, including many of the most creative people, so it seems a terrible mistake to encourage practices that exclude such a huge number of people from contributing.