[14] The terms out-group and in-group are borrowed from Sumner. See W. G. Sumner: Folkways.

[15] Alfred Loisy: The War and Religion.

[16] Ibid., p. 65.

[17] Ibid., p. 62.

[18] Ibid., p. 20.

[19] Ibid., p. 79.

[20] J. M. Robertson: Patriotism and Empire.

[21] Ibid., p. 36.

[22] Wm. McDougall: Social Psychology, p. 55.

[23] Walter Lippmann: The Stakes of Diplomacy, p. 208.