Well into its second century now, the history of SIM is a history of God graciously using generations of ordinary and imperfect people to display his mercy and to extend his kingdom to where He is least known. The result has been Jesus building his Church through new and multiplying churches and mission societies representing millions of his redeemed followers. Starting from several western countries with handfuls of individuals possessing oversized burdens for least reached peoples of the world, SIM has grown and evolved into a truly international movement with over 4000 laborers from 65 countries laboring together in more than 70 countries. Many thousands more are prayer and support partners from around the globe. This short history is an overdue overview that begins to scratch the surface of an amazing story, and happily points the way forward for those wanting to know more.