Note 8 — Chapter V · CONCLUSION.

Warfare plays a great part in savage life, and we have found that the requirements of warfare sometimes prevent, but in other cases further the rise of slavery. Many savage tribes increase their population by introduction of foreign elements. This may be done for two reasons: men are wanted either for labourers or for warriors8. In the former case the introduction of aliens leads to slavery in its most general form of extratribal slavery. When warriors are wanted, slavery is not the most appropriate form; adoption of foreigners, such as was for instance practised by the Iroquois, answers the purpose better, because a man who enjoys the common privileges of a member of the tribe is more reliable in war than a slave. In such case militarism may prevent the rise of slavery, because all available men are wanted in war and have therefore to be placed on a level with the tribesmen. But where superior military qualities of a tribe render the employment of slaves in warfare (most often in the lower ranks of the army) possible, slaves are sometimes kept mainly for military purposes, especially where prejudices of race or colour prevent the tribe from adopting the foreigners. Then militarism furthers the growth of slavery; for slaves would perhaps not be wanted, if they did not serve as warriors.