How about 1491? He straight up claims the arrival of manioc in Africa contributed to a population boom that presaged the slave trade.

Agricultural societies can subjugate conquered lands so much faster than hunter gatherer and nomadic peoples. It takes far longer to adapt to native food sources than to bring in annual crops that not only take but a few years to establish, but also require removing the forests and prairies of the defeated culture to do it. There is nothing for you here anymore. Assimilate to your new masters.

Also if anyone has refuted that patterns of conquest around the world have been highly amplified in east-west bands because of the biomes those territories represent, I’d love to hear it.