The selections contained in these volumes from the papers and letters of
Leibniz are intended to serve the student in two ways: first, by
providing a more adequate and balanced conception of the full range and
penetration of Leibniz's creative intellectual powers; second, by
inviting a fresher approach to his intellectual growth and a clearer
perception of the internal strains in his thinking, through a
chronological arrangement. Much confusion has arisen in the past through
a neglect of the develop- ment of Leibniz's ideas, and Couturat's
impressive plea, in his edition of the Opuscu/es et fragments (p. xii),
for such an arrangement is valid even for incomplete editions. The
beginning student will do well, however, to read the maturer writings of
Parts II, III, and IV first, leaving Part I, from a period too largely
neglected by Leibniz criticism, for a later study of the still obscure
sources and motives of his thought. The Introduction aims primarily to
provide cultural orientation and an exposition of the structure and the
underlying assumptions of the philosophical system rather than a
critical evaluation. I hope that together with the notes and the Index,
it will provide those aids to the understanding which the originality of
Leibniz's scientific, ethical, and metaphysical efforts deserve.