To provide a more accurate summary, could you clarify what you mean by "Marriage à la Mode"?
For example:
* Are you looking for a summary of Russell's thoughts on marriage in general?
* Are you thinking of a particular essay or book with "Marriage à la Mode" in the title?
* Are you interested in Russell's views on marriage in a specific context, like the Victorian era or the early 20th century?
Once I know what you're looking for, I can provide a relevant and helpful summary.