Majority rule is often adopted almost by default as a group decision rule. One might think, therefore, that the conditions under which it applies, and the argument on its behalf, are well-understood. However, the standard arguments in support of majority rule display systematic deficiencies. This article explores these weaknesses, and assesses what can be said on behalf of majority rule.
Risse, Mathias. "On the Philosophy of Group Decision Methods I: The Non-Obviousness of Majority Rule." HKS Faculty Research Working Paper Series RWP08-064, November 2008.