South Africa’s xenophobia problem

South Africa's wealth and stability has drawn millions of migrants from elsewhere in Africa. Yet migration has tested the Rainbow Nation's unity and...

Debating overpopulation

Overpopulation has been debated since British economist Thomas Malthus famously warned in 1798 that humans could reproduce far faster than they could...

The overpopulation debate

Overpopulation has been debated since British economist Thomas Malthus famously warned in 1798 that humans could reproduce far faster than they could...

Profile: Glencore in Zambia

Glencore is the world's biggest commodities brokerage firm. Reuters called it "the biggest company you have never heard of" after it went to public...