One of the peculiarities of commodity spread is that coffee, while it was discovered in Ethiopia possibly as early as the 800s, it only spread to Yemen and Mecca in the 1400s, and only arrived in Indonesia when the Dutch brought it there.
So say coffee spreads throughout the Islamic world much faster than OTL. Say, Yemen by the 1100s, then to Cairo and Mecca by the 1200s and to southern India, Sumatra, and Java by the 1400s. How big an impact would this have?
So say coffee spreads throughout the Islamic world much faster than OTL. Say, Yemen by the 1100s, then to Cairo and Mecca by the 1200s and to southern India, Sumatra, and Java by the 1400s. How big an impact would this have?