Every nation finds it advantageous to combine agriculture with the greatest possible variety of factories. The specialization, of which economists spoke so highly, certainly has enriched a number of capitalists, but is now no longer of any use. On the contrary, it is to the advantage of every region, every nation, to grow their own wheat, their own vegetables, and to manufacture at home most of the produce they consume. This diversity is the surest pledge of the complete development of production by mutual co-operation, and the moving cause of progress, while specialization is now a hindrance to progress. Agriculture can only prosper in proximity to factories. And no sooner does a single factory appear than an infinite variety of other factories _must_ spring up around, so that, mutually supporting and stimulating one another by their inventions, they increase their productivity. III It is foolish indeed to export wheat and to import flour, to export wool and import cloth, to export iron and import machinery; not only because transportation is a waste of time and money, but, above all, because a country with no developed industry inevitably remains behind the times in agriculture; because a country with no large factories to bring steel to a finished condition is doomed to be backward in all other industries; and lastly, because the industrial and technical capacities of the nation remain undeveloped, if they are not exercised in a variety of industries. Nowadays everything holds together in the world of production. Cultivation of the soil is no longer possible without machinery, without great irrigation works, without railways, without manure factories. And to adapt this machinery, these railways, these irrigation engines, etc., to local conditions, a certain spirit of invention, and a certain amount of technical skill must be developed, while they necessarily lie dormant so long as spades and ploughshares are the only implements of cultivation. If fields are to be properly cultivated, if they are to yield the abundant harvests that man has the right to expect, it is essential that workshops, foundries, and factories develop within the reach of the fields. A variety of occupations, and a variety of skill arising therefrom, both working together for a common aim--these are the true forces of progress. And now let us imagine the inhabitants of a city or a territory--whether vast or small--stepping for the first time on to the path of the Social Revolution. We are sometimes told that "nothing will have changed": that the mines, the factories, etc., will be expropriated, and proclaimed national or communal property, that every man will go back to his usual work, and that the Revolution will then be accomplished. But this is a mere dream: the Social Revolution cannot take place so simply.