1886. "Die Philosophie des Thomas von Aquino und die Kultur der Neuzeit."
1886. "Beiträge zur Geschichte der neueren Philosophie." (Second edition, 1906, under the
title "Beiträge zur Einführung in die Geschichte der Philosophie.")
1888. "Die Einheit des Geisteslebens in Bewusstsein und Tat der Menschheit." This will be
published by Williams & Norgate.
1890. "Die Lebensanschauungen der grossen Denker." The ninth edition appeared in 1911.
Changes and additions have been made in each succeeding edition. English translation
(1909) by W.S. Hough and W.R. Boyce Gibson under the title "The Problem of Human Life,
as viewed by the Great Thinkers from Plato to the Present Time" (published by Charles
Scribners' Sons, New York; and T. Fisher Unwin, London).
1896. "Der Kampf um einen geistigen Lebensinhalt." (Second edition, with many changes, 1907.)
A translation of this volume will be published by Williams & Norgate in the spring of
1913.
1901. "Das Wesen der Religion." (First and second editions.) This essay was translated by W.
Tudor Jones in 1904, and was published for private circulation. It is now out of print,
but will soon reappear together with another essay, "Wissenschaft und Religion."
1901. "Der Wahrheitsgehalt der Religion," 1901. (Second edition, with numerous changes, 1905;
third edition, with changes, 1912.) The second edition was translated by W. Tudor
Jones, and published by Williams & Norgate in 1911 under the title of "The Truth
of Religion." A translation of the third German edition will be published at the close
of 1912.
1901. "Thomas von Aquino und Kant: ein Kampf zweier Welten."
1903. "Gesammelte Aufsätze zur Philosophie und Lebensanschauung."