What may have started as a bit of fun grew unexpectedly, exponentially, with unforeseen consequences. But, the more it grew the more deliberate the intent became.
"It's a social-validation feedback loop ... because you're exploiting a vulnerability in human psychology." "The inventors, creators — it's me, it's Mark [Zuckerberg], it's Kevin Systrom on Instagram, it's all of these people — understood this consciously. And we did it anyway."
When someone like him, who was at the forefront of the whole thing, says:
"it literally changes your relationship with society, with each other ... It probably interferes with productivity in weird ways. God only knows what it's doing to our children's brains"
then you know you should be concerned!