Combined wealth jumped from $700 billion to $1.5 trillion; charity slams inequality as 'economic violence,' noting it was accompanied by soaring poverty in rest of world

World Inequality Report says 2020 saw steepest increase in global billionaires' share of wealth on record, while 100 million more people fall into extreme poverty

'We have been brought to our knees by a microscopic virus,' Guterres says, adding pandemic has shone a spotlight on global injustices

Thomas Piketty's research has helped define a debate about the consequences of concentrating so much money and property among so few