Carens, Joseph H. 1987. Aliens and Citizens: The Case for Open Borders. The Review of Politics 49(2): 251-73.
Zolberg, Aristide 2012 “Why Not the Whole World? Ethical Dilemmas of Immigration Policy.” American Behavioral Scientist 56(9): 1204-1222.
Beinart, Peter 2017 “How the Democrats Lost Their Way on Immigration” The Atlantic Magazine July/August. (you may also listen to this article)
