Answer:
Social circle versus money
Step-by-step explanation:
To start with Jane Austen´s Pride & Prejudice, which is much more than a love story. Jane Austen clearly shows her ideas on marriage in a Male-centered England, where the relation between money and marriage is quite clear. This is particularly obvious in the mother-daughter relationship in which the mother pressures the daughter into marriage because of financial profits.
In the Death of Ivan Ilych by Leo Tolstoy there is no aversive element in the decision of Ilych to marry Fedorovna, therefore it is a more natural and almost casual act.