Private property offends against justice. "The labor of all has produced the entire accumulated mass of wealth, that of the present generation as well as that of all that went before. The house in which we happen to be together has value only by its being in Paris, this glorious city in which the labor of twenty generations is piled layer upon layer. If it were removed to the snow-fields of Siberia, it would be worth substantially nothing. This machine, invented and patented by you, has in it the labor of five or six generations; it has a value only as a part of the vast whole that we call nineteenth-century industry. Take your lace-making machine to the Papuans in New Guinea, and it is valueless."[554] "Science and industry; theory and practice; the invention and the putting the invention in operation, which leads to new inventions again; head work and hand work,--all is connected. Every discovery, every progress, every increase in our wealth, has its origin in the total bodily and mental activity of the past and present. Then by what right can any one appropriate to himself the smallest fraction of this vast total and say 'this belongs to me and not to you'?"[555]--But this unjust appropriation of what belongs to all has nevertheless taken place. "Among the changes of time a few have taken possession of all that is made possible to man by the production of goods and the increase of his productive power. To-day the land, though it owes its value to the needs of a ceaselessly increasing population, belongs to a minority which can hinder the people from cultivating it, and which does so--or at least does not permit the people to cultivate it in a manner accordant with modern needs. The mines, which represent the toil of centuries, and whose value is based solely on the needs of industry and the necessities of population, belong likewise to a few, and these few limit the mining of coal, or entirely forbid it when they find a better investment for their money. The machines, too, are the property of a handful of men; and, even if a machine has indubitably been brought to its present perfection by three generations of workers, it nevertheless belongs to a few givers of work. The roads, which would be scrap-iron but for Europe's dense population, industry, trade, and travel, are in the possession of a few shareholders who perhaps do not even know the location of the lines from which they draw princely incomes."[556] 2. Mankind will soon have passed the stage of evolution to which private property belongs. Private property is doomed.[557]