In the old dispust about homogenous concept and big survey of czech history fased Radl against the historical relativism of trhe Gollian school and he poses the demand of rigorous concepts, stressing the role of Theories and timeless ideas in molding the historical knowledgew. His "Válka Čechů s Němci" (War of Czechs with Germans, 1928) was an effort to explicate the capacity of such an approach.