It’s a bad movie that you might have seen before. It tends to show up whenever an advocate of voluntary cooperation explains how society could operate without state coercion. Right on cue, the zombies from “Night of the Living Statists” rear their heads and mindlessly intone, “But if there’s no government, who will build the roads?!”
The zombies can’t hear your response, so it’s useless to try to give them facts and explain how things could be done in a way that’s better for everyone if roads and other such things were provided as private services rather than as coercive government monopolies. For those who are open to the facts, though, is there any evidence that people can actually cooperate voluntarily for their own interests?
As a matter of fact, there’s quite a bit of evidence of that.

My father taught me not to trust; that’s been very tough to change
Why did I really feel annoyed? They were happy; I was jealous
If you live by your principles, others won’t control your actions
It took me years to feel the anger I’d repressed since childhood
Romantic attraction is a trickster, appearing when we least expect it
Love drives us mad, but madness rescues us from ‘horrible sanity’
Predictions of doom keep failing, so isn’t it rational to doubt them?
Unhappiness can’t hide forever when life has gone very wrong