I love that my building (and so many like it here) routinely posts notices about how to live with other people well.

"Yo Soy Un Buen Vecino": I am a good neighbour.

I mean, some of these reminder posts are hilarious - reminding kids how to use the elevators respectfully, & pet owners to clean up after their animals - but this one covers the basics: seek dialogue and reconciliation, respect human dignity and difference, the rights of other humans.

Easy on a local level.
Tough on a global one!