Bingley's arrival in the neighborhood (Pride and Prejudice)

Her 'mean understanding, little information and uncertain temper' notwithstanding, Mrs. Bennet personifies the aspiration in the atmosphere.

For the Bennet girls, with their estate entailed away, marriage holds out the promise of a better life. Their father, in his quiet, seemingly indifferent manner, wishes for it. All of Longbourn and the neighborhood is on the lookout for eligible men, prospective romance and marriage.

Society is evolving, class distinctions are becoming fainter. The business class, with its increasing wealth moves up the social heirarchy. The energy and bold initiative that is the need of the hour is not being generated sufficiently by the landed aristocracy. The rigidity of the social structure begins to crumble. The upper classes need the vitality and freshness of the lower to breathe life into it. The lower classes are conscious enough to rise higher.

This theme of evolutionary social development is expressed in the story through the institution of marriage. Marriage is an instrument for social evolution in this society because the society is still physical.

Bingley arrives at Netherfield with Darcy at this moment, the right time, as an answer to Mrs. Bennet's, and everyone else's aspiration.