+271. Slavery taught steady labor.+ It seems to be also right to understand that slavery proved to be a great schoolmaster to teach men steady work. If that view is correct, we must understand that no men would do any hard, persistent work if they could help it. The defeated were forced to it, and learned to submit to it. Then they helped the whole society up to a higher status, in which they also shared.[627] Von Goetzen gives some proof of this when he states that he and his troop of carriers sat by the camp fire evenings and that one after another told his life. "Nearly all had been, as children, brought from the inner country to the coast by slave dealers. Now they were proud of this slavery, proud of belonging to the 'cultivated' and of not being any longer 'wild' men."[628] In that view slavery is a part of the discipline by which the human race has learned how to carry on the industrial organization. There are some tasks which have been very hard and very disagreeable. Comrades in an in-group have never forced these on each other. It seemed to be good fun, as well as wise policy, to make members of a rival out-group do these tasks, after defeating them in war. For women the grinding of seeds (grain) always was a heavy burden until modern machinery brought natural powers to do it. For men the rowing of boats (galleys) has been a very hard kind of work.[629] After slavery came to exist it was extended to other cases, even to some classes of cases in the in-group. Of these cases the first was that of debt. Amongst the Eveans a debtor who cannot pay is put to death. This, however, is a very exceptional rule.[630] The course of thought is, that a debtor has used another man's product and is bound to replace it. He therefore falls into servitude to his creditor in fact, whether it is so expressed or not. He must live on and work for the creditor. Another case in which slavery was introduced was that of crime. The criminal fell under obligations of restitution of value to an individual or to the whole (chief). Other cases of extension of slavery will appear below. We have many cases of groups exploited by other groups. The former are then inferior and despised groups who are tyrannized over by others who have beaten them in war or easily could do so.