It was bad enough when I was growing up in the 1970s and 1980s, when girls were exposed to airbrushed and later photoshopped models. But those were adult strangers; they were not a girl’s competition. So what happened when most girls in a school got Instagram and Snapchat accounts and started posting carefully edited highlight reels of their lives and using filters and editing apps to improve their virtual beauty and online brand? Many girls’ sociometers plunged, because most were now below what appeared to them to be the average. All around the developed world, an anxiety alarm went off in
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