 Complete the following phrase:  It is also noted that in practice ethnic federations have frequently failed: but it is rarely clear how far this is because ethnic federalism is a misconceived institutional form or because of the inherent difficulties in running a state with deep ethnic divisions overwhelmingly, those states that adopt ethnofederalism do so because alternatives have been tried already, and have failed. Anderson 2013 cites among the failures: Eastern Europe the Soviet Union, Czechoslovakia, and Yugoslavia, Africa the East African Federation and 