The original plan called for Unpopular Essays to follow close upon the heels of Marriage and Morals, and there doesn’t seem to be a good reason to further perfect the plan, to use the old Soviet terminology.
Unpopular Essays was published in 1950 by George Allen & Unwin; I will be using the Routledge paperback, which includes an Introduction by Kirk Willis and a one-page preface by Russell. The Routledge edition first appeared in 1995; my copy is a 2000 reprint. Here is a list of the titles of the twelve chapters:
1. Philosophy and Politics
2. Philosophy for Laymen
3. The Future of Mankind
4. Philosophy’s Ulterior Motives
5. The Superior Virtue of the Oppressed
6. On Being Modern-minded
7. An Outline of Intellectual Rubbish
8. The Functions of a Teacher
9. Ideas that have Helped Mankind
10. Ideas that have Harmed Mankind
11. Eminent Men I Have Known
My suspicion is that my running summentary of these disparate essays will be a bit more selective than what spewed forth from Marriage and Morals. Onwards.
[Update: Apparently the entirety of Unpopular Essays is available online here.]