Source: wikibot/arrow-s-impossibility-theorem

= Arrow's impossibility theorem
{wiki=Arrow's_impossibility_theorem}

Arrow's impossibility theorem, formulated by economist Kenneth Arrow in his 1951 work "Social Choice and Individual Values," addresses the challenges of aggregating individual preferences into a collective decision or social welfare function. The theorem states that no voting system can convert individual preferences into a collective outcome that satisfies a specific set of reasonable criteria at the same time.