Both The Lottery and Those Who Walk Away from Omelas demonstrate the basic selfishness of people living in a seemingly prosperous and peaceful society. (sociological critique)

The Lottery by Shirley Jackson (short story)
Citation: Jackson, Shirley. The Lottery. Literature: A Portable Anthology, Second Edition, Edited by Janet E. Gardner, Bedford /St.Martins Publishers, 2010, pp. 242-249.
Those Who Walk Away From Omelas by Ursula K. LeGuin (short story)
Citation: LeGuin, Ursula K. Those Who Walk Away From Omelas. Mott Community College, www.mccc.edu/pdf/eng102/Week%209/Text_LeGuin%20Ursula_Ones%20Who%20Walk%20Away%20From%20Omelas.pdf