This reminds me: I'm currently reading "At Home" (Bill Bryson), and he says that the mystery of how ancient peoples managed to turn teosinte into something worth growing and eating. The scholarly research, e.g. [1] seems to be about maize <i>spread</i>, which is interesting, but it begs the question of how and why they made it into maize in the first place.<p>Even more amusing, he says there was a conference at the Univ. of Illinois in 1969 on this, and it was so contentious (even getting personal at times) that no papers resulted.<p>[1] <a href="https://archive.ph/Ub586" rel="nofollow noreferrer">https://archive.ph/Ub586</a>