400,000 plant species and we built entire civilizations around two shrubs. Not wheat, not rice , not anything that keeps you alive. Two plants whose main offering is a chemical that delays the feeling of tiredness for a few hours. Cultures that never had contact with each other, separated by oceans and centuries, independently figured out that these particular plants were worth domesticating, trading, and eventually growing on a continental scale. The maps published by VividMaps using SPAM 2020 V2r0 data illustrate the regions where these two species are cultivated. Coffea began in the forests of Ethiopia and eventually reached every continent with a suitable climate, which turns out to be a fairly specific set of places. Camellia sinensis moved outward from Chinese hillsides, first along trade routes and later through deliberate colonial transplantation into India, Sri Lanka, and East Africa. Both plants traveled well because dried leaves and roasted seeds don't spoil easily....
Exploring the Planet & Ourselves