Last month, with space in the print edition of Physics World tight, I cut a couple of sentences from the end of a short review I’d written of Len Fisher’s new book, The Perfect Swarm. This turned out ...

What is the best voting system? What is the best voting system? Voting seems relatively straightforward, yet four of the most widely used voting systems can produce four completely different winners.

With 24 declared candidates for the Democratic Party’s presidential nomination (and counting), many Americans are likely wondering how the party will ultimately make up its mind and settle on the best ...

The Condorcet paradox, whose origins are associated with the 18th century French philosopher, Marquis de Condorcet, is a formulation within social choice theory which postulates that even if ...