Social choice
Economics and mathematics, twentieth century
It formalises how individual preferences or judgments can yield collective decisions.
Historical context
Social choice theory developed twentieth-century tools for studying aggregation, voting, and collective evaluation.
Overview
A majority may prefer A to B, another B to C, and another C to A. This shows that turning individual preferences into a collective ranking can require choices about which properties of the rule to preserve.
Main claims
Aggregation rules must be assessed by how they treat information, consistency, and individual influence.
Debates and nuances
Impossibility theorems identify tensions among specific aggregation conditions.
This entry provides educational context.