> There are around 140 species of wild potato in South America, growing from Mexico in the north all the way down to Argentina and Chile in the south.
Super nit, but do authors think Mexico is in South America?
By "in South America" they meant "South of America" :-)
I can easily forgive the statement you highlighted, but there is zero information about potatoes in this one:
Along with wheat, maize and rice, they are estimated to account for up to 80% of all calories eaten by people worldwide.