Among all two-candidate voting systems that never result in a tie, majority rule is the only one that treats all voters equally, treats both candidates equally, and is nonmanipulable.

Question

Quizplus · Accepted Answer

This is known as the Arrow's Impossibility Theorem, which shows that no rank-order voting system can satisfy all desirable criteria simultaneously. Majority rule satisfies the criteria of treating all voters and candidates equally and being nonmanipulable. Other voting systems may satisfy some of these criteria but fail to satisfy others.

Among All Two-Candidate Voting Systems That Never Result in a Tie