William McDougall

“As one travels up any one of the large rivers [of Borneo] ,one meets with tribes that are successively more warlike. In the coast regions are peaceful communities which never fight
save in self-defense, and then with but poor success, whereas in the central regions, where the rivers take their rise, are a number of extremely warlike tribes whose raids have been a constant source of terror to the communities settled in the lower reaches of the rivers.... It might be supposed that the peaceful coast people would be found to be superior in moral qualities to their more warlike neighbors, but the contrary is the case. In almost all respects the advantage lies with the warlike tribes. Their houses are better built, larger, and cleaner; their domestic morality is superior; they are physically stronger, are braver, and physically and mentally more active and in general are more trustworthy. But, above all, their social organization is firmer and more efficient because their respect for and obedience to their chiefs and their loyalty to their community are much greater; each man identifies himself with the whole community and accepts and loyally performs the social duties laid upon him.”
― William McDougall