In the early 1800s, Australia was twice saved from famine by eating virtually nothing but hemp seed for protein and hemp leaves for roughage.
Australia and China both saved from famine by hemp.
http://www.hempfarm.org/Food.html
I did not know any of this information until today. Your comment spurned me into action, reading action.
Disasters and government policies throughout history have starved millions to their deaths. Armed with this knowledge and a modest collection of seeds (Thank you OG! 
) I’ll be ready for the next Holodomor, earthquake, or volcano to deprive my community of nutrition.