He regarded the struggle as one between Science and Religion. I
believed then, and am convinced now, that it was a struggle
between Science and Dogmatic Theology.

More and more I saw that it was the conflict between two epochs
in the evolution of human thought--the theological and the
scientific.

So I kept on, and from time to time published New Chapters in the
Warfare of Science as magazine articles in The Popular Science
Monthly. This was done under many difficulties. For twenty
years, as President of Cornell University and Professor of
History in that institution, I was immersed in the work of its
early development. Besides this, I could not hold myself
entirely aloof from public affairs, and was three times sent by
the Government of the United States to do public duty abroad:
first as a commissioner to Santo Domingo, in 1870; afterward as
minister to Germany, in 1879; finally, as minister to Russia, in
1892; and was also called upon by the State of New York to do
considerable labor in connection with international exhibitions
at Philadelphia and at Paris. I was also obliged from time to
time to throw off by travel the effects of overwork.

The variety of residence and occupation arising from these causes
may perhaps explain some peculiarities in this book which might
otherwise puzzle my reader.

While these journeyings have enabled me to collect materials over
a very wide range--in the New World, from Quebec to Santo Domingo
and from Boston to Mexico, San Francisco, and Seattle, and in the