(27)For the most part, utopian communities in which members jointly share ownership of all property and split both the labor and rewards generating by the communities have failed in the U.S.Utopian communities have disbanded because they did not work well and lost membership.Exceptions in the U.S. perhaps include Amish and Mennonite communities.Internationally, many of Israel's Kibbutzim have continued to persist.

Explain what: (a) free riding; (b) adverse selection; and, (c) brain drain have had to do with the failures and disappearances of most utopian communities.

Why have some Amish/Mennonites/Kibbutzim constituted at least partial exceptions?