There is a quote attributed to Confucius in 6 century BCE.
“If there is righteousness in the heart, there will be beauty in the character.
If there is beauty in the character, there will be harmony in the home.
If there is harmony in the home, there will be order in the nations.
When there is order in the nations, there will peace in the world.”
These verses in Mark nicely outline how the beginning for peace in the world is found at the doorstep of welcoming hospitality as a sign of righteousness.