58% of the deaths worldwide are caused by hunger/malnutrition.

The United Nations Development Programme’s Human Development Report 2000 found that of the 62 million annual deaths in the world every year, 36 million were attributable either directly to hunger and malnutrition, or indirectly by way of a compromised immune system caused by malnutrition. That is to say, infections that would normally be easily treatable become deadly because of a starving person’s weak immune system can’t fight back.

A study from the Comission on Human Rights lays the blame on the fact that at least 1.2 billion people in the world were living on an income of less than $1 US every day. The world’s agricultural resources are capable of providing food to give each member of the entire world’s population 2700 calories every day. Still, at the time (in 2000), 826 million people out of the then-6 billion people in the world were suffering from serious, chronic food deprivation.
(source)