It might appear that as he thus rose, the effect of his competition in the low skilled labour market would disappear.

And this would be so were it not for the persistent arrival of new-comers to take the place of those who rise.

It is the continuity in the flow of foreign emigration which constitutes the real danger.
Economic considerations do not justify us in expecting any speedy check upon this flow.

The growing means of communication among nations, the cheapening of transport, the breaking down of international prejudices, must, if they are left free to operate, induce the labourer to seek the best market for his labour, and thus tend to equalize the condition of labour in the various communities, raising the level of the lower paid and lower lived at the expense of the higher paid and higher lived.
Sec.10.The Water-tight Compartment Theory .-- One point remains to be mentioned.

It is sometimes urged that the foreign Jews who come to our shores do not injure our low skilled workers to any considerable extent, because they do not often enter native trades, but introduce new trades which would not have existed at all were it not for their presence.