It is common to see Jews referring non-Jews who are interested in Judaism but not prepared to commit to following halakha to Noahidism or simply to follow the 7 laws; however, it seems to me to be quite rare to see Jews actively proselytizing for Noahidism.
Are Jews supposed to encourage non-Jews to follow the 7 laws, or do we just hope that they'll do it? If we are supposed to encourage it, why is it so rare to see active engagement today?
Basing himself on Maimonides' ruling in Hilkhot Melakhim (8:10), "וכן צוה משה רבינו מפי הגבורה לכוף את כל באי העולם לקבל מצות שנצטוו בני נח" , the Lubavitcher Rebbe argued that it is incumbent upon each Jew to persuade the gentiles into observance of the seven Noahide laws. See Ha-Pardes vol. 59:9 (1985), pp. 7-11. Michael J. Broyde, “The Obligation of Jews to Seek Observance of Noahide Laws by Gentiles: A Theoretical Review,” in Tikkun Olam: Social Responsibility in Jewish Thought and Law (Jason Aronson, 1998) pp. 103-143, concludes that “the weight of halachic authority is contrary to this analysis.” See also the study by R. J. David Bleich in Tikkun Olam, who adopts an intermediate view.
i would like to add another point, the Lubavitcher Rebbe also said that the reason this was not a common practice throughout the ages was because of jewish persecution. and that many halchic rulings were based on that, or coming in that spirit. however today when we are in a "malchus shel chessed", different times call for different measures.
see http://www.sichosinenglish.org/books/sichos-in-english/13/09.htm beginning of second paragraph
see also http://www.sichosinenglish.org/books/sichos-in-english/26/01.htm part 5
In 1999 a book called ‘Kol Boei Olam’ (כל באי העולם) (All Inhabitants of the World) was compiled by Rabbi Chaim Miller, and published by Vaad Migola L’Geulah, Brooklyn N.Y. It is a detailed compilation of the Lubavitcher Rebbe's teaching on Noachide Halacha and Hashkafa. Unfortunately it has not been translated into English.
