"In combination with strict monogamy and other kosher practices, yes," the Librarian says. "The previous religions, from Sumer up to Deuteronomy, are known as prerational. Judaism was the first of the rational religions. As such, in Lagos's view, it was much less susceptible to viral infection because it was based on fixed, written records. This was the reason for the veneration of the Torah and the exacting care used when making new copies of it—informational hygiene."