I'd like to take this opportunity to point out a common statistical manipulation - extending an axis far longer than is at all relevant to the data, creating a misleading interpretation of a slope.
Note how both are ~equivalent for a majority of the time, barring 1943 - 1951 (slight edge for food security) and 1960-1970 (larger lead for 'world hunger'). At 1970, food insecurity takes and maintains control.
This is likely because it - as discussed in the rest of the thread - encompasses more, and is a more useful term for scholarly discussion.
Right around the time when the Trilateral Commission, the Club of Rome and other elitist think tanks / NGOs were founded to push globalization, development and such ideas.