The problem of obtaining sufficient food has plagued man since his beginning. Despite many advances in science and technology during the 20th century, the problem is still acute today.
Tillman, Allen D.
"The World Food Problem,"
Naval War College Review: Vol. 21:
2, Article 9.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol21/iss2/9