Mutual majority criterion
The mutual majority criterion is a criterion used to compare voting systems. It is also known as the majority criterion for solid coalitions and the generalized majority criterion. The criterion says that if a majority of voters like a group of candidates more than all of the other candidates, then one of the candidates in the group must win. This is similar to but but more broad than the majority criterion, where the group of candidates can only have one candidate in it. The Droop proportionality criterion is a more broad form of the mutual majority criterion, which also applies to multi-winner elections.