labour, and that low wages lead to their own rise by discouraging marriages and reducing the supply of labour. That, says Marx, is very fine, but before high wages could have produced a redundant population (which would take eighteen years to grow up), wages would, with modern industrial cycles, have been up, down, and up again through ordinary fluctuations of trade. Relative over-population is of three kinds: current, latent, and stagnant. Current over-population is what comes from incidental causes, the ordinary changes that take place in the every-day course of industry. A trade is slack this season and brisk the next, has perhaps its own seasons, like house-painting in spring, posting in summer. Or one trade may from temporary reasons be busy, while others are depressed. In the last half year of 1860 there were 90,000 labourers in London out of employment, and yet the factory inspectors report that at that very time much machinery was standing idle for want of hands. This comes from the labourer being mutilated--that is, specialized--under modern subdivision of labour, and fit for only a single narrow craft. Another current cause of over-population is that under the stress of modern labour the workman is old before his years, and while still in middle life becomes unfit for full work, and passes into the reserve. Marx says this is the real reason for the prevalence of early marriages among the working class. They are generally condemned for being improvident, but they are really resorted to from considerations of providence, for working men foresee that they will be prematurely disabled for work, and desire, when that day comes, to have grown-up children about them who shall be able to support them. Other current causes are new inventions and new fashions, which always throw numbers out of work. Latent over-population is what springs from causes whose operation is long and slow. The best example of it is the case of the agricultural labourers. They are being gradually superseded by machinery, and as they lose work in the country they gather to the towns to swell the reserve army there. A great part of the farm servants are always in this process of transition, a few here, and a few there, and a few everywhere. The constancy of this flow indicates a latent over-population in the rural districts, and that is the cause of the low wages of agricultural labourers. By stagnant over-population Marx means that which is shown in certain branches of industry, where none of the workmen are thrown back entirely into the reserve, but none get full regular employment. CHAPTER V. THE FEDERALISM OF CARL MARLO.