It seems that the authors do not understand the 'zero-sum' definition and apply it to various situations where it simply does not apply. To pick for example th

It seems that the authors do not understand the 'zero-sum' definition and apply it to various situations where it simply does not apply. To pick for example the first article, the only one linking to the full article and not just an extract: Australians probably do not believe that there's a fixed sum of humans in the world and every new Iraqi means one less Australian. The demand to pick a nationality might be a bias (though plenty of states do not allow dual-citizenship), but it's not a 'zero sum' bias as commonly understood - nobody believes that there's an 'Australia-Iraq' game where only one side may win.