Arrow's theorem only applies to ranked voting systems. Approval and Range voting pass its criteria: https://en.wikipedia.org/wiki/Arrow%27s_impossibility_theor

Arrow's theorem only applies to ranked voting systems. Approval and Range voting pass its criteria: https://en.wikipedia.org/wiki/Arrow%27s_impossibility_theorem#Rated_voting_systems_and_other_approaches https://en.wikipedia.org/wiki/Arrow%27s_impossibility_theore...