▁occasions ▁to ▁rec ount ▁some ▁of ▁their ▁own ▁spiritual ▁war fare ▁enc oun ters . ▁In ▁the ▁nin ete enth ▁century , ▁one ▁of ▁the ▁major ▁evangel ical ▁authorities ▁on ▁demon ▁possession ▁was ▁the ▁mission ary ▁to ▁China , ▁John ▁Living stone ▁Ne vi us . ▁ ▁During ▁the ▁late ▁tw enti eth ▁century , ▁evangel ical ▁writers ▁such ▁as ▁Mark ▁B ube ck ▁and ▁M err ill ▁Un ger ▁presented ▁their ▁the ological ▁and ▁past oral ▁response ▁to ▁demon ic ▁phen omena . ▁The ▁problem ▁of ▁demon ▁possession ▁and ▁spiritual ▁war fare ▁became ▁the ▁subject ▁of ▁a ▁Christian ▁Medical ▁Association ▁sym pos ium ▁that ▁was ▁held ▁in ▁ 1 9 7 5 . ▁This ▁sym pos ium ▁brought ▁together ▁a ▁range ▁of ▁evangel ical ▁sch ol ars ▁in ▁bib lic al ▁studies , ▁the ology , ▁psych ology , ▁anth rop ology , ▁and ▁miss i ology ▁( see ▁Mont gom ery , ▁Dem on ▁Poss ession ). ▁ ▁One ▁of ▁the ▁very ▁significant ▁German ▁writers ▁is ▁the ▁Luther an ▁Kurt ▁E . ▁Koch ▁whose ▁work ▁has ▁influenced ▁much ▁of ▁both ▁evangel ical ▁and ▁char ism atic ▁thought ▁in ▁the ▁late ▁tw enti eth ▁century . ▁The ▁impact ▁of ▁his ▁ideas ▁has ▁been ▁recently ▁exam ined ▁by ▁the ▁fol kl ore ▁special ist ▁Bill ▁Ell is . ▁ ▁Pent ec ost al ism ▁ ▁Spirit ual ▁war fare ▁has ▁become ▁a ▁prominent ▁feature ▁in ▁Pent ec ost al ▁trad itions . ▁The ▁concept ▁is ▁well ▁embedded ▁in ▁Pent ec ost al ▁history