Columbia subject headings:
Ethics, Modern--19th century.
Ethics, Modern--20th century.
Ethics--Great Britain.
Harvard subject headings:
Ethics, Modern--19th century.
Ethics, Modern--20th century.
Ethics--Great Britain--History--19th century.
Ethics--Great Britain--History--20th century.
Ethics--Great Britain.
Princeton subject headings:
Ethics, Modern--19th century.
Ethics, Modern--20th century.
Ethics--Great Britain.