s ▁Category : Pe ople ▁from ▁R ust enburg ▁Category : R ugby ▁union ▁fl ank ers ▁Category : R ugby ▁union ▁number ▁e ights ▁Category : Border ▁Bul ld ogs ▁players <0x0A> </s> ▁P ure ▁Theory ▁of ▁Law ▁() ▁is ▁a ▁book ▁by ▁legal ▁the or ist ▁Hans ▁K elsen , ▁first ▁published ▁in ▁ 1 9 3 4 ▁and ▁in ▁a ▁greatly ▁expanded ▁" second ▁edition " ▁( effect ively ▁a ▁new ▁book ) ▁in ▁ 1 9 6 0 . ▁The ▁second ▁edition ▁appeared ▁in ▁English ▁translation ▁in ▁ 1 9 6 7 , ▁as ▁P ure ▁Theory ▁of ▁Law , ▁the ▁first ▁edition ▁in ▁English ▁translation ▁in ▁ 1 9 9 2 , ▁as ▁Introduction ▁to ▁the ▁Problem s ▁of ▁Leg al ▁Theory . ▁The ▁theory ▁proposed ▁in ▁this ▁book ▁has ▁probably ▁been ▁the ▁most ▁influ ential ▁theory ▁of ▁law ▁produced ▁during ▁the ▁ 2 0 th ▁century . ▁It ▁is , ▁at ▁the ▁least , ▁one ▁of ▁the ▁high ▁points ▁of ▁modern ist ▁legal ▁theory . ▁ ▁Ed itions ▁The ▁two ▁ed itions ▁of ▁K elsen ' s ▁book ▁were ▁separated ▁by ▁twenty - six ▁years , ▁and ▁the ▁second ▁edition ▁( 1 9 6 0 ) ▁was ▁almost ▁twice ▁the ▁length ▁of ▁the ▁first ▁in ▁the ▁detail ▁of ▁its ▁presentation . ▁The ▁original ▁termin ology ▁which ▁was ▁introduced ▁in ▁the ▁first ▁edition ▁was ▁already ▁present ▁in ▁many ▁of ▁K elsen ' s ▁writ ings ▁from ▁the ▁ 1 9 2 0 s , ▁and ▁were ▁also ▁subject