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PostGerrymandering in UK? (Harry Papasotiriou, Greece, 06/24/18 3:41 pm)
In response to John E's question, gerrymandering is explicitly prohibited in the United Kingdom, where the parliamentary constituencies are drawn by non-political bodies on the basis of the principle of keeping natural units (towns, city districts) together as much as possible. The United States seems to be an outlier in this respect.
JE comments: Eugenio Battaglia has written that Italy is also free of gerrymandering. Just today in the Detroit Free Press, I received confirmation for what we already knew: Michigan is one of the absolute worst states (top four) for gerrymandering. The contorted districts benefit Republicans:
A two-party, "winner take all" system lends itself far more to gerrymandering. In parliamentary systems with proportional representation (i.e., Party X receives 15% of the vote and 15% of the seats), there is no incentive to get inventive with the map.