But our advocates of restriction and home monopolies exclaim--Why export workmen when so much improvement can still be made in Britain? Why import food and raw produce while we have full capacities of growing enough at home? Were Great Britain properly cultivated it would produce double what it now produces. The answer is, It is not what Britain is capable of producing, but what it in reality will be made to produce, which concerns us. Further improvement, and even the keeping up of the improvement already effected, depend upon the returns of the capital employed. If, from the less exhausted field for production abroad, we can obtain ten per cent. per annum for capital, while from the more exhausted, restriction-limited field at home, we can obtain only four per cent., capital will continue to be exported and British improvement will languish, or things will retrograde. This is the actual state of matters, and unless means are taken to bring about a more salutary state, the improvements they look forward to, and which Britain is indeed susceptible of, will never be attained. By a properly conducted colonization, in the first place, diminishing the labour-supply, and acting as a stimulus to our labour-market, and afterwards affording a continually increasing stimulus by means of the new-created, fast-extending colonial field of demand for British manufactures, and all this working in mutual reaction to excite industry, we may in reality go on improving till Britain produce ten times over what she now produces. This attempt to draw attention to colonization proceeds from no wish to check the present national effort to obtain free trade! Colonial intercourse is in effect a circumscribed kind of free trade, under peculiarly favourable circumstances; _and the amazing increase, and vast extent and advantage, of our colonial trade, is the most direct proof of the advantage, not only to Britain, but to mankind, which would result from free trade over all_. Every enactment to prevent the exchange of the produce of labour between man and man, and nation and nation, if the article is not injurious to health and morals, is truly diabolic. All who have aided in these enactments ought to be held up to the detestation of mankind as repressers of industry, as promoters of misery, as ministers of evil, selfishly bent upon rendering abortive the good which a benevolent Providence has designed for man, in forming one portion of the earth more fitted for the seat of manufacturing industry and trade, and other portions for the peculiar production of various kinds of food and raw material, thus calculated, by giving rise to a reciprocity of advantageous intercourse, to promote an enlightening and friendly connection, and to diffuse science, morality, the arts of life, all that conduces to improvement and happiness, over the nations.