▁transformed ▁to ▁be ▁a ▁“ service ▁ag ency ” ▁of ▁and ▁for ▁the ▁Latin ▁American ▁church . ▁ ▁Evangel ism - in - Dep th ▁( E ID ) ▁ ▁E ager ▁to ▁mobil ize ▁every ▁bel ie ver , ▁Stra chan ▁orch estr ated ▁Evangel ism - in - Dep th ▁( E ID ). ▁The ▁four ▁main ▁object ives ▁of ▁E ID ▁centered ▁around ▁the ▁responsibility ▁Christians ▁carry ▁in ▁fost ering ▁con greg ation ▁and ▁out re ach . ▁Moreover , ▁the ▁mission ▁work ▁of ▁E ID ▁reflected ▁what ▁was ▁called ▁the ▁“ St ra chan ▁theorem ”, ▁which ▁stated ▁that ▁“ the ▁expansion ▁of ▁any ▁movement ▁is ▁in ▁direct ▁proportion ▁to ▁its ▁success ▁in ▁mobil izing ▁its ▁total ▁membership ▁in ▁continuous ▁propag ation ▁of ▁its ▁belief s .” ▁To ▁practice ▁this , ▁Stra chan ▁went ▁door - to - door ▁sharing ▁the ▁g ospel , ▁ma iled ▁inv itations ▁to ▁E ID ▁meet ings , ▁pain ed ▁b ann ers ▁around ▁town , ▁and ▁dropped ▁hand b ills ▁from ▁air plan es . ▁Stra chan ▁launched ▁E ID ▁in ▁Nic ar agua ▁( 1 9 6 0 ) ▁and ▁Gu atem ala ▁( 1 9 6 2 ). ▁Ult imately , ▁E ID ▁spread ▁to ▁the ▁Car ib bean ▁and ▁South ▁America . ▁E ID ▁pione ered ▁a ▁new ▁strategy ▁and ▁program ▁for ▁mission aries ; ▁the ▁movement ▁unders cor ed ▁the ▁role ▁of ▁the ▁church ▁and ▁drew ▁public ▁attention ▁to ▁Christian ity . ▁To ▁the ▁current ▁day , ▁E