“Why did God make such explicit commands about protecting strangers, widows, and orphans? Because these individuals are among the most vulnerable of all God’s children. That vulnerability was particularly pronounced and acute in the ancient world. God seeks especial care for the most vulnerable on earth, promising His wrath upon those who will not show mercy.”
http://www.ldsliving.com/Why-God-Calls-His-People-Strangers-What-It-Has-to-Do-with-Covenants/s/84551
