You can broadcast a single thought to everyone alive. What thought would cause immediate chaos everywhere?
This is assuming that the thought is translated into something each person can understand.
"Remember you'll die."
I'm not a troublemaker so it would have to be for a good reason... and how I wish I could shake people out of their stupor and there's no better way than to consider your own mortality, as it puts things into perspective.
Millions of traumatized children, though.
Eh, they were gonna be aware of it regardless, it's just a bit uncomfortable, lol. I mean, the whole prompt was to create chaos, this is but a step above "Santa's not real" and under "Western amorality and capacity to organise for the purpose of murder and pillage with no second thoughts has given the West their position in the world for about two millennia". Any reasonable human was gonna realize it eventually, is what I mean. 🤷
Fair!
Polyphia's album is amazing BTW.