“When talking about polarization, many people will try to assign blame to various groups: “It’s the media,” “It’s politicians trying to get power,” “It’s the political party machines manipulating us,” “It’s the rich trying to divide us,” “It’s the colleges.” And there are valid points to be made about how various organizations and systems and institutions amplify the effects of polarization — but it’s also true that those systems and organizations are made up of people. The same dynamics that can make individual people become polarized can make groups of people and organizations become polarized.”