If we hold that these economic causes are now the most important causes of wars, it is easy to accept the conclusion that the most fundamental, and even perhaps the sole cause of war is the evil principle of ownership, as is actually maintained by many economists. If men in cliques, and men as individuals did not own privately great parts of the wealth of the world, these conflicts in which wealth and its distribution are the most vital interests would not take place. Many socialists, we know, hold these views, asserting that wars are due solely to industrial competition among nations, and to the fact that industrialism is based upon the wholly wrong principle of private ownership. Hullquist, a socialist, says that wars are likely to become more frequent and more violent as the capitalist system of production approaches its climax. The working classes, the socialists say, who have nothing permanent, are the natural enemies of war; the capitalists, who have much and want more, are constantly placing peace in jeopardy. The protective system of tariff also receives much abuse from these writers. Novicow (71) places the tariff system high among the causes of war. The belief that it is good to sell and bad to buy, he says, is the great trouble maker in the world. This was also the principle of Cobden the great English free-trader of the middle of the last century. The Manchester school of which he was the leader would do away with wars by making the world economically a unit. Veblen (97) charges the price system with being a fundamental cause of war, and says that it must now come up for radical examination and perhaps modification. The theory of the rights of property and contract which have been taken as axiomatic premises by economic science may itself fail, or at least be thrown open to question. Either the price system will go, or there will be wars between nations in the future as there have been in the past, because of the need of protection of ownership rights, and because of the nationalism these rights create. To some extent these rights of property _have_ been curtailed, Veblen remarks; the old feudalistic rights have in large part been annulled, and the world is at least owned by more people than was once the case. That these changes and readjustments of property rights will be carried still further he thinks there can be no doubt.