Note 342 — Chapter XVII · THE NEW PROBLEM OF IMMIGRATION

The importance of this change is emphasized by noting Professor Guy S. Callender’s statement, “Perhaps the most important circumstance affecting American society is the fact that the people have always been in contact with unoccupied lands.” Economic History of the United States, p. 667. Professor Taussig points out also, in this connection, that unskilled labor is more needed when a plant is being constructed than when it is being utilized. Principles of Economics, Vol. II, p. 154, footnote.