The tradition of picking a nominee through primaries and caucuses – and not through what is called the “convention system” – is relatively recent. In 1968, after President Lyndon B. Johnson announced

Until 1968, presidential candidates were picked by party conventions – a process revived by Biden’s withdrawal from race

Amazon countries are stepping-up measures to counter illicit financing of nature crime

South Africa’s coalition government – making the case for hope

Keir Starmer: what we know about Britain’s new prime minister and how he will lead

Mu: everything you need to know about the new coronavirus variant of interest

Origins of the Taliban and what their history tells us about takeover of Afghanistan – podcast

Japan: why PM Suga unexpectedly stepped down – and what happens next

How to make sure Biden's infrastructure plan can hold up to climate change – and save money

Closed borders, travel bans and halted immigration: