Ubi Arcano Dei Consilio §31

³¹ Is it to be wondered at then that, with the widespread refusal to accept the principles of true Christian wisdom, the seeds of discord sown everywhere should find a kindly soil in which to grow and should come to fruit in that most tremendous struggle, the Great War, which unfortunately did not serve to lessen but increased, by its acts of violence and of bloodshed, the international and social animosities which already existed?