“I am obliged to rebuke my pupils between every sentence for all their little natural ways which surely go to prove the accuracy of Tiecks proposition that all Krieg is natural to man”
Inferred Fuller cites a specific proposition by Ludwig Tieck, the central Romantic figure, that "all Krieg [war/conflict] is natural to man," though no specific work is named; the proposition may derive from his essays, dramatic criticism, or literary writings.