Voltaire's first major philosophical work in his battle against "" was the "Traité sur la tolérance" ("Treatise on Tolerance"), exposing the Calas affair, along with the tolerance exercised by other faiths and in other eras (for example, by the Jews, the Romans, the Greeks and the Chinese). Then, in his "Dictionnaire philosophique", containing such articles as "Abraham", "Genesis", "Church Council", he wrote about what he perceived as the human origins of dogmas and beliefs, as well as inhuman behavior of religious and political institutions in shedding blood over the quarrels of competing sects. Amongst other targets, Voltaire criticized France's colonial policy in North America, dismissing the vast territory of New France as "a few acres of snow" ("").