Schneerson expanded the Lubavitcher concept of Chabad (a Hebrew acronym for the words wisdom, understanding, and knowledge) to include outreach to all Jews anywhere. The network of Mitzvah Mobiles, roving rabbis, Chabad Houses, and married emissaries called shluchim that he fostered has, since his death, grown even bigger, so that Chabad-Lubavitch, as it is sometimes called, is now the fastest-growing—and most visible—Jewish movement in the world. (less info)