In some regions of Afro-Eurasia, however, such as Central Asia, the Middle East, and North Africa, the gains in productivity from secondary products were so great that entire communities began to live off their livestock, following them from grassland to grassland, living in tents, and returning to a nomadic way of life. We call such people pastoral nomads. Their mobility made pastoral nomads perfect connectors between distant regions, and eventually, they would carry ideas, technologies, people, goods, and even diseases right across Afro-Eurasia through the so-called Silk Roads.
