Who Knows One? We All [Should] Know One!
The Gemara in Avodah Zara poses the following query: What is a ger toshav? A ger toshav is not obligated in all the mitzvos that a Yid is.
Non-Jews
Seven Noahide Laws in the Gemara
The seven commandments binding on all mankind, and how non-Jews can be held responsible for laws they may never have been taught.