The NYT has this excellent graphic to illustrate the food crisis we are facing now.
Consider these figures
1. Adjusting for inflation and exchange rates, the wealthy countries, as a group, cut donations to agriculture in poor countries roughly in half from 1980 to 2006, to $2.8 billion a year from $6 billion. The United States cut its support for agriculture in poor countries to $624 million from $2.3 billion in that period.
2. Adjusted for inflation, the World Bank cut its agricultural lending to $2 billion in 2004 from $7.7 billion in 1980.