John Hobson, a liberal economist, contended that imperialism stems from internal economic causes. Overproduction of commodities leads the government to search for outside markets to dump excess products on.

From Imperialism:

"It is open to Imperialists to argue thus: 'We must have markets for our growing manufactures, we must have new outlets for the investment of our surplus capital and for the energies of the adventurous surplus of our population:' such expansion is a necessity of life to a nation with our great and growing powers of production.

An ever larger share of our population is devoted to the manufactures and commerce of towns, and is thus dependent for life and work upon food and raw materials from foreign lands. In order to buy and pay for these things we must sell our goods abroad. During the first three­quarters of the nineteenth century we could do so without difficulty by a natural expansion of commerce with

continental nations and our colonies, all of which were far behind us in the main arts of manufacture and the carrying trades. So long as England held a virtual monopoly of the world markets for certain important classes of manufactured goods, Imperialism was unnecessary.

After 1870 this manufacturing and trading supremacy was greatly impaired: other nations, especially Germany, the United States, and Belgium, advanced with great rapidity, and while they have not crushed or even stayed the increase of our external trade, their competition made it more and more difficult to dispose of the full surplus of our manufactures at a profit. The encroachments made by these nations upon our old markets, even in our own possessions, made it most urgent that we should take energetic means to secure new markets. These new markets had to lie in hitherto undeveloped countries, chiefly in the tropics, where vast populations lived capable of growing economic needs which our manufacturers and merchants could supply. Our rivals were seizing and annexing territories for similar purposes, and when they had annexed them closed them to our trade The diplomacy and the arms of Great Britain had to be used in order to compel the owners of the new markets to deal with us: and experience showed that the safest means of securing and developing such markets is by establishing 'protectorates' or by annexation....

It was this sudden demand for foreign markets for manufactures and for investments which was avowedly responsible for the adoption of Imperialism as a political policy.... They needed Imperialism because they desired to use the public resources of their country to find profitable employment for their capital which otherwise would be superfluous....

Every improvement of methods of production, every concentration of ownership and control, seems to accentuate the tendency. As one nation after another enters the machine economy and adopts advanced industrial methods, it becomes more difficult for its manufacturers, merchants, and financiers to dispose profitably of their economic resources, and they are tempted more and more to use their Governments in order to secure for their particular use some distant undeveloped country by annexation and protection.

The process, we may be told, is inevitable, and so it seems upon a superficial inspection. Everywhere appear excessive powers of production, excessive capital in search of investment. It is admitted by all business men that the growth of the powers of production in their country exceeds the growth in consumption, that more goods can be produced than can be sold at a profit, and that more capital exists than can find remunerative investment.

It is this economic condition of affairs that forms the taproot of Imperialism. If the consuming public in this country raised its standard of consumption to keep pace with every rise of productive powers, there could be no excess of goods or capital clamorous to use Imperialism in order to find markets: foreign trade would indeed exist....

The driving forces of class interest which stimulate and support this false economy we have explained. No remedy will serve which permits the future operation of these forces. It is idle to attack Imperialism or Militarism as political expedients or policies unless the axe is laid at the economic root of the tree, and the classes for whose interest Imperialism works are shorn of the surplus revenues which seek this outlet."