Human industry is more efficient, and therefore there is more to be divided among mankind.
But in so far as that prosperity is based on a general rise of prices, it is only imaginary.

A general rise of prices is a rise only in name; whatever anyone gains on the article which he has to sell he loses on the articles which he has to buy, and so he is just where he was.

The only real effects of a general rise of prices are these: first, it straitens people of fixed incomes, who suffer as purchasers, but who have no gain to correspond; and secondly, it gives an extra profit to fixed capital created before the rise happened.

Here the sellers gain, but without any equivalent loss as buyers.

Thirdly, this gain on fixed capital is greatest in what may be called the industrial 'implements,' such as coal and iron.