That's fair criticism. My intent was to give an example of a hugely addictive product that shaped the course of history. Facebook is, obviously, not physically addictive like an opioid.

But it is addictive. Dopamine-hit addictive (thanks, likes and little red notification dots!). In what appears to be a very universally appealing way.

It'll be an interesting day indeed when the people living in my alley are moaning for a little bit of Facebook.