New York/London/São Paulo — The world is hurtling towards an unprecedented hunger crisis. As many as 132-million more people than previously projected could go hungry in 2020, and this year’s gain may be more than triple any increase this century. The pandemic is upending food supply chains, crippling economies and eroding consumer purchasing power. Some projections show that by year’s end, Covid-19 will cause more people to die each day from hunger than from virus infections. What makes the situation unmatched: The huge spike is happening amid enormous global food surpluses. And it’s happening in every part of the world,...