Food and the Environment

The reasons that food and environmental securities were not included in the UN's Declaration of Human Rights are two fold. First of all the issues of famine and environment were not prevalent at the time that the declaration was written. In 1948 there was no movement for environmental sustainability or against unsafe environments as there is today. The same was true with food. There were famines in the mid 1900's, but without globalization at the scale it is today these famines were not widely known about. Niether food nor environmental securities were prevalent at the time, so they were left out of the declaration.
The second reason they were left out was because even though they were issues, there was not much that could be done about them. People were starving, and declaring that every human has a right to food essentially makes a country responsible. The UN did not want to create more work for itself by declaring that what was currently happening was a problem that needed addressing