of economic principles to them, or in expounding the elements of his
method in a lucid, accurate and illuminating way, so that, through his
instruction, the number of those who can think for themselves may be
increased.

This Series is directed towards the latter aim. It is intended to
convey to the ordinary reader and to the uninitiated student some
conception of the general principles of thought which economists now
apply to economic problems. The writers are not concerned to make
original contributions to knowledge, or even to attempt a complete
summary of all the principles of the subject. They have been more
anxious to avoid obscure forms of expression than difficult ideas; and
their object has been to expound to intelligent readers, previously
unfamiliar with the subject, the most significant elements of economic
method. Most of the omissions of matter often treated in textbooks are
intentional; for as a subject develops, it is important, especially in
books meant to be introductory, to discard the marks of the chrysalid
stage before thought had wings.

Even on matters of principle there is not yet a complete unanimity of
opinion amongst professors. Generally speaking, the writers of these
volumes believe themselves to be orthodox members of the Cambridge
School of Economics. At any rate, most of their ideas about the
subject, and even their prejudices, are traceable to the contact they
have enjoyed with the writings and lectures of the two economists who
have chiefly influenced Cambridge thought for the past fifty years,
Dr. Marshall and Professor Pigou.

J.M. Keynes.