THE EARTH AS MODIFIED BY HUMAN ACTION.

A NEW EDITION OF MAN AND NATURE.

BY

GEORGE P. MARSH.


"Not all the winds, and storms, and earthquakes, and seas, and seasons
of the world, have done so much to revolutionize the earth as MAN, the
power of an endless life, has done since the day he came forth upon it,
and received dominion over it."--H. Bushnell, Sermon on the Power of an
Endless Life.

1874.



PREFACE TO THE FIRST EDITION.

The object of the present volume is: to indicate the character and,
approximately, the extent of the changes produced by human action in the
physical conditions of the globe we inhabit; to point out the dangers of
imprudence and the necessity of caution in all operations which, on a
large scale, interfere with the spontaneous arrangements of the organic
or the inorganic world; to suggest the possibility and the importance of
the restoration of disturbed harmonies and the material improvement of
waste and exhausted regions; and, incidentally, to illustrate the
doctrine that man is, in both kind and degree, a power of a higher order