Just as the ‘poverty line’ determines what’s required for basic living, we need a ‘wealth line’ to show when extreme wealth becomes harmful, says economist and philosopher Ingrid Robeyns

Catapulted by the triumphant market debut of his rocket company SpaceX, Elon Musk is now the world's first trillionaire, as expected. However, that...

On an unremarkable Friday this June, a number appeared across every headline. A trillion.